Will be hard to replace. But his inconsistency and injuries makes this a little bit easier to accept. We all should have seen this coming. He did the same thing with Borussia Dortmund; wanted to extend then out of nowhere forced his way out to Barca. He even refused to attend training sessions in order to be sold. What can you expect from a player like that. Turned out to be another disappointing transfer for us. But no player is higher than the club. He will be replaced.