Mathieu Flamini says Arsenal have learnt their lessons from last year's heavy defeat at Chelsea - and they want to make amends on Sunday.
The Gunners lost 6-0 at Stamford Bridge last season after being reduced to 10 men when Kieran Gibbs was sent off for Alex Oxlade-Chamberlain's handball.
Flamini believes Arsenal have matured since that difficult day and will show more tactical discipline this weekend.
"We came from two goals behind against Everton whereas last year we lost there. We need to be ready for Chelsea because it will be a battle"
"It's important to attack but we have to keep our shape and stay in the game until the last minute," he said. "We're going to try not to repeat the same mistake as last year.
"We collapsed very quickly. After 17 minutes we were down to 10 men, but we have learnt from our mistakes and we go there with a lot of confidence.
"We have a lot of maturity, quality and we now have more focus in the team. We came from two goals behind against Everton whereas last year we lost there. We need to be ready for Chelsea because it will be a battle."
Flamini says it will be 'very special' to play against former Gunner and good friend Cesc Fabregas, with whom he reached the Champions League final in 2006.
"I will probably mark him and it won't be an easy game because he's a great player with unbelievable talent," Flamini said.
"He works for the team and he's a top guy with a great mentality. He's definitely one of the players we need to be careful of on Sunday."
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