Not sure if this is true but I have just learnt from someone's facebook status that he is injured? As I say I'm not sure if this is true, nevermind whether if it is serious, but this could be a big blow to you guys. It may force Wenger to spend though!
Not watching the game but I hear he's come back on having been stretchered off. I still think Arsenal need another natural goalscorer. Your other strikers will get around 15 goals a season each but you need a player who can get 20+, and not just Van Persie.
He got kicked on the back of the ankle by Garay and was on the floor for a while and it looked like he done somthing to his knee because his foot got stuck in the turf and it twisted a bit, but he got up and played normally for the rest of the half. No limping or anything.