Mauricio Pochettino has shown a strong tactical prowess in terms of results since becoming manager, and his three-centre-back system for Tottenham Hotspur was dominant last season, so it makes sense that this season will continue.

However, some changes in Tottenham's personnel this season have loosened the three-centre-back system.

The three centre-backs are extremely demanding of the two wing-backs, but this season Kyle Walker has switched to Manchester City, and Danny Rose has just recovered from injury and is still returning to training. Their replacements, Kieran Trippier and Ben Davies, were not able to cover both ends of the pitch at the same end, so the deadliest gap in Tottenham's three-centre-back formation in the first half was frequently exploited by Arsenal.

On the other hand, Arsenal, who also use a three-centre-back formation, is likely to be one of Arsenal's best signings this season with free signing Seyad Kolasinac, who can fly on the wings and cover both ends of the pitch with Héctor Bellerin on the right.

As for the gap in the ribs, Aaron Ramsey, who concentrated on defending in the first half, and Tan Xibi, who was his own midfielder, made up for this weakness perfectly, making it impossible for Tottenham to open the opponent's ribs.

On the other hand, after Toby Alderweireld's injury, there were also problems with the combination of three central defenders.

Although Eric Dier can play as a cameo at central defence and Pochettino himself has always believed that Dier can be a top central defender, whether it is Dier himself or Dier's performance in the first half, his most suitable position is still defensive midfield.

In the first half, Dier, who was in the middle of the three central defenders, had a number of problems with passing and marking, giving Arsenal plenty of chances, except for a passing error in the first half that allowed the opponent to shoot, and in the second goal, Alex Lacazette made a simple run for Dier to miss Alex Sanchez at the back post, allowing him to easily score an empty goal.

Moussa Sissoko has been at Tottenham for nearly a season and a half, and he still hasn't adapted to Tottenham's system, and in the first half, he didn't know how to pass the ball after pushing the ball into Tan Xibi, not to mention not knowing how to pass the ball after advancing to the front.

In the case of injuries to the main defender Victor Wanyama and Alderweireld, Pochettino insisted on three central defenders, then Dier could only move to central defenders, and the midfielder could only use Sissoko, in this configuration, Tottenham's last round of victory over Crystal Palace was extremely difficult, and the first half of the game was to fully expose the weaknesses of the current staffing in advance, how to play in the second half, Pochettino must consider making timely adjustments, otherwise according to Arsenal's crazy state in the first half, he may have to concede the goal.

If it is like the last round of Arsenal away to Manchester City, Tottenham also suffered a big defeat, even if Pochettino's position is very stable, but in the future, the Argentine young coach must have a very difficult time, you know, Tottenham and Arsenal fans have a good saying, even if the team does not perform well in a season, as long as it can win the opponent, it is enough.

"Do you want to change people?" Pochettino was torn between substitutions or substitutions.

In the second half, the two sides did not make substitution adjustments, and in the cheers of nearly 50,000 Gunners fans in the stadium, the home team, which vowed to chase the poor to the end, attacked the Tottenham backfield violently, as if it was not the opponent who fell behind in the first half, but themselves.

Seeing Sissoko and Moussa Dembele frequently broken through by him like bulky wood in front of Tan Xibi, who was short but very flexible, Pochettino waved his hand and replaced!

Less than three minutes into the second half, Tottenham made substitutions, and they ran out of substitutions in one go.

No. 29 Harry Winks replaces Dembele, No. 18 Fernando Llorente replaces Delai Ali and No. 7 Son Heung-min replaces Harry Kane.

This substitution has caused countless people's question marks, although they are all counterpoint substitutions, but to replace Ali and Kane, is this to admit defeat?

'Winks should be in control of the tempo of midfield and use his forward passes to create chances. Jamie Redknapp is clearly more familiar with Tottenham's talented midfielder.

'If they want to consolidate their Champions League top spot, Tottenham can't at least lose away to Borussia Dortmund, and replacing Alli and Kane is obviously a way to save strength and avoid injuries in this derby.' Graeme Souness speaks out.

'Son is in good form, he's very mobile and his movement, but you have to be careful with Llorente, he's dangerous with his headers. Thierry Henry analyses Tottenham's substitution strategy.

"You can't get past Wall's defence when you walk on the ground, and Tottenham have to switch to long passes." Martin Taylor said.

Son Heung-min's appearance immediately caused mutual resentment between South Korean fans and Chinese fans on the Internet.

"The Asian derby begins, see how Son Heung-min saves Tottenham!"

"666, it's really funny, it's also an Asian derby, my Tan Qiu King can even freeze the Mei Qiu King, Sun Xingmin is a fart."

"Tan Xibi Xi has the blood of my Korean nation."

"On shamelessness, Lao Tzu only serves Goryeo sticks!"

"Come on Tan Xibi, although I am very unhappy that you quit the national team, as long as you beat Sun Xingmin, I will forgive you!"

……

Shortly after coming on as a substitute, Ben Davies made a long pass directly to the front from the left sideline of the backfield, and Laurent forced Laurent Koscielny's header outside the arc of the penalty area to Son Xingmin, who was inserted into the penalty area, and Son Xingmin grabbed the second landing point and volleyed unguarded, because the shot was too hasty, the shot was very threatening.

This simple and crude attack boosted Tottenham's morale, and Tan Xibi immediately clapped his hands and shouted: "Pay attention to the second point of protection!" ”

Son Xingmin just took advantage of Arsenal's unfavorable protection of the two penalties at the top of the arc to form this threatening shot, which was quickly seen by Tan Xibi, and immediately reminded his teammates, Sun Xingmin glanced at Tan Xibi and ran back to the position with mixed feelings.

"Wall is getting more and more generalistic." Steve Boulder smiled at Arsène Wenger.

Arsenal are the ones who need to speak out in adverse situations, reminding everyone to avoid the same mistakes next time, and curbing the morale of their opponents who are just getting up.

As captain, Koscielny was actually not very competent, he was too silent.

Even the first captain, Per Mertesacker, can't do the targeted reminder like Tan Xibi.

Not to mention Petr Cech, who can only speak up when defending set-pieces, and Jack Wilshere, who replaces shouting with action.

"Wouldn't it be too early if Wall was to be the captain?" Wenger said suddenly.

Boulder was stunned.