That’s the verdict of footballer-turned-pundit Graeme Le Saux ahead of tomorrow’s showdown at Stamford Bridge.
The London rivals go into the clash off the back of wins in Europe - Arsenal beat Cologne 3-1, while Chelsea thrashed Qarabag 6-0.
And they’ll both be hoping to build on those results as they look to lay the foundations for respective title challenges.
Chelsea lost just five games and conceded the third-fewest goals as they won the Premier League for the second time in three years last term.
Le Saux has pinpointed where the Blues are suspect going into their derby against Arsenal though.
Le Saux said: "All teams have a weakness and while I am not going to single out any one player, Chelsea’s problems are at the back so far this season.
"They have conceded the highest total out of all the teams in the current top seven.
"Arsenal can have some joy if they draw out the centre-backs to wide areas and get in behind.
"That is one of Arsenal strength’s and where they might find some joy on Sunday."
Arsenal can move into the top four if they beat Chelsea and results elsewhere go their way this weekend.
Graeme Le Saux spoke to Starsport on behalf of Betfair. For more from Le Saux go tohttps://betting.betfair.com/football/graeme-le-saux
