For a start, does the Arsenal manager stick with Wojciech Szczesny in goal? On his first Premier League outing against Manchester United, the 20 year-old's performance was the only plus point to come out of the defeat.

But if that needs serious consideration, Wenger won't spend so long on his next call. Having come on as a second-half substitute at Old Trafford, Cesc Fabregas should definitely return as the forward point of a three-man midfield.

Then there's the situation up front, where Robin van Persie hasn't looked very sharp since returning from a long injury lay-off. The Dutchman has been back on the scene for a while now without threatening to get anywhere near his usual standards.

As a result, Wenger has stuck with Marouane Chamakh in the league, only introducing Van Persie for limited times off the bench. It does make you wonder what will happen for a game in which Arsenal need all their big guns firing heavy artillery.

From a tactical point of view, Chamakh would test Chelsea's two centre-halves, John Terry and Branislav Ivanovic, in a slightly different way from his team-mate. The Moroccan, for example, will hang on the last line of defence much more, trying to find space in between defenders from where he would hope to make a run and get in behind.