Heard a interesting story about Xhaka which might apply to Perez.
From Liam Brady...Xhaka is immense and right up there with Vieira but the senior players in the team don't respect him so when he's driving the team forward he often gets ignored.
Natural leader.
The younger players all love him.
Probably the same with Perez...his workrate, tracking back and overall drive is right up there but he's probably finding it difficult with some of the arse holes at the club.