But Spaniard Alonso believes the players available are ready for the match, and is sure he can force his way back into the side after being dropped for the mid-week defeat at Monaco.
He said: "It's up the manager who plays and I accept that. I just want to make sure I'm ready for Sunday's game. It's a pity we have so many injuries but the players we do have will be ready for this game. We can't say this is a bad time to play Arsenal. We have to be strong and just think about the game."