Arsene Wenger has warned Tottenham boss Andre Villas Boas that signing too many players will unbalance his squad and cause technical issues.
The Gunners host their north London rivals this weekend and the Arsenal boss is seemingly unconcerned with the summer spending spree down the road at White Hart Lane.
"In our job there is a technical risk when you buy more than three players because you unbalance a little bit the stability of the squad," he told reporters.
The Frenchman has come in for heavy criticism over the lack of signings made by his club this transfer window after both Yaya Sanogo and Mathieu Flamini, Arsenal's only summer signings, joined on free transfers.
Spurs have recently added Vlad Chiriches to their list of additions and are set to sign Erik Lamela from Roma and Christian Eriksen from Ajax.
Sunday's match is eagerly anticipated for many reasons, including the gap of one point that separated the two teams last season, the difference is summer activity between the clubs and most notably, the fact that the north London derby promises goals.
Wenger doesn't seem worried ahead of the high-pressure clash and believes AVB has a lot of work to do in order to find his best team and keep everyone happy.
"You have to find a way to integrate more. And your squad is always a balance, and there's a bit more risk," he added.
The Arsenal boss is aware of Spurs potential this season but is focusing on his own side.
"Honestly I must confess that I am not too much worried about their (Spurs) risk (to Arsenal) and what they can do. I believe you win games when you focus on yourself and the quality of our game. It's not a special statement for Tottenham," he concluded.
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