Barcelona goalkeeper Victor Valdes admit he's never heard of Marouane Chamakh.
The Morocco striker is set to lead the Arsenal line tonight at the Nou Camp.
"I don't know him, but if he is at Arsenal he must be good. I will be wary of him," Valdes told Le Parisien.
"We will wait for the team news to be sure that Van Persie won't play. Apart from the coach of Arsenal, nobody knows who will play."
Click here for the No1 coverage of all the gossip and transfer news around Arsenal.