Lukas Podolski

Reason to watch: Will it be the Lukas Podolski of Euro 2012 or World Cup 2010?

There are a lot of questions surrounding Podolski. No doubt he's a great signing, but how will Arsene Wenger utilise him?

He played most of last season at Koln as a central striker, but frequently turns out on the left wing for Germany.

You can see him working well with Olivier Giroud, and that combination could be lethal, but how compatible he is with Robin van Persie is a different proposition altogether.