A lot of it is to do with our set up. At Real Madrid in his last season he averaged 2.77 tackles a game. He joined us and for the last 2 seasons he's been attempting 3.77 tackles a game.
The midfield set up is so open that it's a really difficult job.
His workload on the pitch is massive. I think unfortunately, he's also lost a lot of confidence in his ability as well - he just looks timid nowadays.
The more passive way of defending relies on a compact midfield up where you've narrowed down the passing lanes and options.