Arsenal hero Emmanuel Petit has questioned Granit Xhaka's ability.
The Gunners captain fired back at the club's critics after the loss to Sheffield United on Monday.
But Petit thinks Xhaka has failed to deliver on a consistent basis as the club's leader.
He told Paddy Power: "Can you imagine Patrick Vieira on the pitch on Monday night? He would have been shouting at his team-mates, asking them: 'What the f*ck are you doing?'
"I don't see that with Xhaka. I do with Guendouzi - he's one of the few who shows he wants to win every game. He's got a lion's heart.
"Guendouzi is relied upon a lot by [Unai] Emery, and that's because he's showing anger on the pitch. He hates to lose games, you can see that he's ready to fight for every single ball. He plays to his strengths and he does that well.
"That's more than you can say for some of the other midfielders. Can anyone tell me what is Xhaka's best quality? I don't know why he has been made captain. The leadership is absent."
