Chelsea were unfazed by the goals conceded and continued to hold on to their solid defence.

Even with Cheng Hai's ability, there are not many ways.

Of course, Cheng Hai has too many perfect skills and too strong strength in all aspects, and he can still find an opportunity to create danger for Chelsea's goal after all.

Before the end of the first half, in the 43rd minute, Cheng Hai received a pass from teammate Gundogan on the line of the big penalty area through perfect off-ball running and point-grabbing ability, and almost broke the Chelsea goal.

It's a pity that Cheng Hai was a little unlucky, and this kind of non-stop ball rush in the fierce scramble is not as 100% as the penalty kick.

When shooting, Cheng Hai pursued the angle of the goal corner too much, and as a result, the ball hit the outside of the goal post in the upper right corner and popped up on the bottom line.

Cheng Hai still failed to score in the first half after all.

Of course, Cheng Hai's shot still scared the Chelsea players, coaches and fans enough, and there was a feeling of aftermath after seeing the ball bounce off the bottom line by the post.

If they are two goals down in the first leg, it will not be easy for Chelsea to turn the tables even if they return to home in the second leg.

One minute of stoppage time, the referee blew the whistle for the end of the first half, and the two sides went into the break with a score of 1-0, and Dortmund, who were playing at home, temporarily led by one goal.

The Chelsea who played away from home said they could accept the score in the first half, but Dortmund, who were in the lead, were a little depressed.

If you can't lead your opponent by a big score at home, you can beat your opponent and advance to the semi-finals at Stamford Bridge away.

That's the disadvantage of home and away on the schedule.

But the score has become like this, and everyone has no choice but to continue to work hard in the second half.

After a 15-minute break, the two sides changed sides and Dortmund continued to press Chelsea's defence with better fitness in an attempt to bring down the opposition.

But Chelsea's veterans at the back do work hard enough and work together well enough.

One person can't guard Cheng Hai, but he can always break Cheng Hai's ball through multiple people and wait for opportunities to help defend, or force him to pass the ball out.

Although Cheng Hai did not fall into the trap of fighting alone again, he did not have much room to play under the strict defense of the other party.

Fortunately, in order to defend Cheng Hai, Chelsea not only paid the price in terms of manpower, but also paid a lot of money in fouls, and suffered a few yellow cards.

In the 57th minute, Cheng Hai was knocked down by a side tackle by Essien when he used the gorgeous technique of pedaling a bicycle to break through Essien, nicknamed "Ghana Buffalo", more than ten meters outside the right corner of the penalty area.

Essien was booked and gifted Borussia Dortmund a free-kick on the right side of the pitch.

It was difficult to shoot the ball directly, so it was Mario Gotze who took the penalty and hoisted the ball into the penalty area, where Cheng Hai, Lewandowski, Gundogan, Hummels, Subotic and others fought for it.

Height and weight are good, running without the ball, grabbing points, physique, bounce, header skills are all full value Cheng Hai has naturally become the focus of Chelsea's focus on the target, there are three Chelsea players around him to defend him, and they are all tall and strong types, and strive not to lose to Cheng Hai in the body collision and bouncing battle.

As a result, Mario Gotze's free-kick was not hoisted near Cheng Hai at the forward point, and several Chelsea defensive stalwarts who tried their best to keep an eye on Cheng Hai did their part.

When everyone turned their heads to look behind the ball in the direction of the ball, they found that Dortmund centre-back Hummels who rushed up to the top did not know when he ran to the back post, and only one Chelsea full-back Ferreira followed him.

But Hummels' height is 191cm and his weight is 88kg, and Ferreira's height is 182cm and his weight is 76kg, and one is a central defender and a full-back.

So, unsurprisingly, Hummels leaped high into the left corner of the six-yard box to beat Paolo Ferreira and slotted Gotze into the near corner of the net with a fierce head.

Goalkeeper Petr Cech had already moved from the right side of the goal line to the left when he found out that Gotze did not give the ball to Cheng Hai at the front post, but hoisted it to the back post.

However, Hummels' header was too awkward, and when Ferreira couldn't put too much pressure on him, Hummels perfectly used his centre-back's precise control of the header and headed the ball into the top left corner of the goal.

Cech couldn't touch the ball and could only watch as it flew into the net.

The moment the ball flew into the Chelsea goal, the entire Westfarun Stadium exploded.

Because, this is the second goal scored by Hummels, and it is also the only two goals scored by both sides so far in this game.

Borussia Dortmund's centre-back Hummels scored both goals of the game to score a brace and his first brace in a single game this season.

Not only Hummels is completely crazy, but even the fans and commentators are crazy.

When watching Cheng Hai score goals has become a habit and is not strange, suddenly Cheng Hai did not score, but a central defender scored two goals in a row and scored two goals, and it was strange that everyone was not crazy or excited.

The commentators screamed in the commentary booth to sing Hummels' praises, and more than 70,000 Hornets fans chanted Hummels' name and bowed to him under the leadership of the live announcer.

A brace from centre-back Hummels was a great deal. The goal was a huge blow to the Chelsea players.

They did all the preparation and training before the game, and they worked hard and united enough in the game, and successfully froze Cheng Hai, who was known as the world's No. 1 striker, so that Cheng Hai did not score a goal, not even an assist.

At the same time, in addition to Cheng Hai, they did their best to cooperate with the tacit defense so that Dortmund's other attacking players such as Lewandowski, Kagawa Shinji and others almost did not play.

Unexpectedly, they defended Dortmund's attacking line, but the opposing central defender Hummels scored twice in a row to give Dortmund a 2-0 lead over Chelsea.

It's just too hard to accept.

The average age of themselves is older than Dortmund, they are mainly defensive, and the physical consumption is greater than that of the attacking side, and by this time in the second half, many people's physical fitness has been on the verge of limit.

Unexpectedly, in the end, he still failed to defend the goal, allowing a central defender of the opposing side to rush up and score a brace.

Both physically and mentally, Hummels' two goals were a huge blow to the Chelsea crowd.

However, just as the Chelsea players were devastated and frustrated, Blues manager Roberto Di Matteo made a timely change and delivered new tactical instructions onto the pitch.

To be able to adjust Chelsea's defense to such a point of freezing Cheng Hai in the middle of the takeover, Di Matteo's level is still very high.

As an assistant coach, he has a long-term relationship with the players, which also makes the Blues more trusting him and obey his tactical arrangements.

As a result, Chelsea, who had conceded two goals, did not panic and counterattack after the resumption of the game, trying to equalise, but continued to defend solidly and wait for opportunities to counter-attack under Di Matteo's tactical instructions.

When there is no opportunity, resolutely do not press forward in formation to counterattack, creating opportunities and space for Dortmund to counterattack.

This made Cheng Hai's intention to score before the end of the game finally failed.

Because of the increased running and sprinting speed, Cheng Hai's physical energy consumption was also faster than usual.

In the 73rd minute, Cheng Hai finally ran out of energy and couldn't take a walk, so he had to take the initiative to apply to Klopp to get off the field.

Borussia Dortmund made a substitution, replacing Cheng Hai with Barrios.

Cheng Hai did not score a single goal in this game, nor did he have an assist, which is an extremely rare scene in Cheng Hai's official matches so far.

But when the game ended, the fans at Westfalen Stadium still gave Cheng Hai a round of applause.

Fans with a little discerning can see that although Cheng Hai has no goals or assists, his role on the field is still very huge, and it can even be said that it is more important than Hummels who scored two goals.

It was his intimidating power on the pitch that attracted the most of Chelsea's defensive attention that allowed Hummels to open up a shot and score a rare brace at centre-back.

After Cheng Hai went off the field, Chelsea also made substitution adjustments, replacing Terry and Lampard, two veterans who had almost exhausted their physical energy in order to defend Cheng Hai, and replaced them with two new forces, and finally started a counterattack.

With two goals down, Chelsea couldn't really be happy with the scoreline, and Di Matteo was just worried about Cheng Hai's presence.

Now that Cheng Hai is off the field, although the other Dortmund attacking players are also dangerous, the degree of danger is always worse than Cheng Hai, and the Blues are two goals behind, and it is impossible to attack without attacking.

That's gambling!

But Di Matteo was right.

After Chelsea began to counter-attack, more space and space were naturally revealed at the back, and Dortmund also counter-attacked and attacked, but could not find the back of the net until the end of the game.

Chelsea, on the other hand, finally got a big shot from the back in the 88th minute, Drogba grabbed the first header in front, and Torres swept the ball into the Borussia Dortmund goal with a sideways volley.

The goal left the entire Westfalen Stadium silent, with a few thousand die-hard Blues fans clapping and cheering in the stands.

Chelsea players such as Torres and Drogba on the pitch also celebrated wildly.

This goal made the promotion situation of the two sides suddenly very different.

From 0-2 to 1-2, it wasn't just the aggregate score that went from being two goals down to just one goal, it was crucial that Chelsea scored an away goal.

In this way, when they return to their home stadium, they only need a simple 1-0 to eliminate Dortmund and advance to the last four.

It was entirely possible for Chelsea, who had done a very good job defensively in this game.

Therefore, not only the players, fans, but also the head coach on the sidelines, Roberto Di Matteo, also had a crazy celebration.

The scoreline not only allowed Chelsea to regain confidence in reaching the last four, but it was also a great affirmation of Di Matteo's tactical set-up, which made him confident in his tactics and the return to home game in the second leg.

Even if Borussia Dortmund have world number one striker Cheng Hai, he is confident of leading Chelsea to the last four.

After the restart, although Dortmund attacked aggressively, trying to score another goal, the aggregate score was locked at 3-1.

But there is too little time left.

Four minutes into stoppage time, the referee blew the whistle for the end of the game, and Borussia Dortmund ended the first leg of this season's Champions League quarter-finals 2-1. Although they won the game, Dortmund's players, coaches and fans were not too happy after the game.

Because of the 2-1 scoreline, it was too dangerous.

With the fighting spirit and strength shown by Chelsea in this game, no one is sure whether Dortmund will be able to beat their opponents in the second leg to advance to the semi-finals.

Speaking after the game, the media reported the game with a wrench in the quality and fighting spirit of Chelsea at the Westfalen Stadium.

To keep a clean sheet at Borussia Dortmund's home stadium is something that most teams can't do, even AC Milan can't do it, and Chelsea do it.

The media expressed surprise and admiration for the performances of the Chelsea players and the management of Roberto Di Matteo, while disappointed with the performances of Borussia Dortmund and Cheng Hai.

Cheng Hai, in particular, did not have a single goal or an assist, which was his most disappointing game in the Champions League this season.

Even if the quarter-finals played AC Milan away, Cheng Hai did not score, but still had an assist. Unexpectedly, now at his home stadium, not only was Chelsea prevented by not scoring a goal, but also did not have an assist.

Some are surprising and some are disappointing.

But Cheng Hai doesn't think so.

In an interview with reporters, Cheng Hai said:

'Chelsea were really good but it was we who won in the end, with the aggregate advantage and the initiative to qualify for the last four.

'In the next leg at Stamford Bridge, Chelsea have to take the initiative and it will certainly give us a lot of counter-attacking opportunities.

"As for myself? What if there are no goals, no assists? As long as the team can advance to the semi-finals, what if I don't score a goal? ”

"What's more, the Champions League is the world's most technically and tactically level club competition, with the world's highest level of coaches and players, isn't it too normal to have no goals and no assists in a game in such an event?"

"What's more, so far, I'm still the one who has scored the most goals in a single season this season, and even in the history of the Champions League, and not scoring in this game is not the end of the world."

"If anyone thinks I've let him down, he can try it and see how many Champions League goals he can score in a season!"

After Cheng Hai's answer was published in the newspaper, no one said anything strange anymore.

Because Cheng Hai has a point, with the technical and tactical level of the Champions League and the strength of Chelsea, what is so strange that Cheng Hai does not score?

Whoever thinks they are better than Cheng Hai can try it and see if they can score more Champions League goals than Cheng Hai in a season.

Obviously, this is something that no one can do.

Not to mention now, in the entire history of the Champions League, no one has scored more goals in the Champions League than Cheng Hai in one season.

What's more, the season isn't over yet!

Cheng Hai may even increase the Champions League goals in a single season to 20 goals, which is a record that can only be admired when it is possible to win the Champions League Golden Boot with ten goals.

Of course, it is inevitable that Cheng Hai's domineering response will make him lose some of his popularity and feel that he is too proud.

Many people sneered on the Internet and waited for Chelsea to knock Dortmund out of the second leg, and when the time came, Cheng Hai was still crazy.

But Cheng Hai doesn't care.

Although Dortmund's performance in this game was a little disappointing, and Chelsea's performance was unexpectedly tough and excellent, Klopp privately summarized the game with the whole team after the game, saying that as long as Dortmund went all out in the second leg, their probability of advancing was still much higher than Chelsea's, and it was not as good as the outside world thought Chelsea had a good chance.

In any case, Dortmund always leads on aggregate, and Chelsea want to eliminate Dortmund, so they can only press out to attack, which is undoubtedly a great opportunity for Cheng Hai, who has perfect technique, extreme speed and full value of running without the ball.

In addition, just like this game, even if Cheng Hai is nailed to death by strict defense, he can create space for other teammates to attack and score.

Finally, there is the physical advantage.

Although no one at Chelsea was completely dragged down by Borussia Dortmund in the first leg, such as cramps or anything, it was clear from the Chelsea people who collapsed to the ground at the end of the game that the vast majority of them were actually stretched to the limit.

The second leg was only a week away from the first round.

For young people, a week's rest is enough. But for Chelsea's veterans over the age of 30, it's not necessarily enough.

If Dortmund continues to play like this in the second leg, Terry, Cole, Ferreira, Lampard and other Chelsea veterans will most likely be unable to withstand it in terms of physical fitness.

Jurgen Klopp's analysis gave Borussia Dortmund a great deal of confidence, and the gloomy confidence at the end of the game was swept away, and the anticipation for the second leg began to rise.

The last four of the Champions League is definitely a desirable place.

In anticipation of the second leg of the Champions League, on March 31, 2012, Borussia Dortmund welcomed the 28th round of the Bundesliga against Stuttgart at the Westfaren Stadium.

Because the next game is the second leg of the crucial Champions League quarter-finals, or away.

As a result, Jurgen Klopp has made extensive changes in this league game to allow his key players to build up fitness for the away game against the Blues Chelsea.

Of course, Cheng Hai is not in the rotation. He can enter deep sleep at any time, and his energy recovery ability makes Klopp not have to worry about him.