Just rest him till the Coppa game. He needs to rest as much as possible. This injury clearly doesn't come from nowhere. This is due to the huge sacrifice this guy is doing to his body.
He is not only playing every game, but he's probably the guy who runs the most in the team now. It actually makes me feel angst when I see the amount of running he does, the guy finishes each and every game in tears.
Just rest him.
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I mean, I feel he plays at the limit of his body all the time. Pretty much like Vidal used to do.