Marvin said:
Not sure people realise how potentially serious this could be.
The hope is it's just bruising or damage to a nerve, as the Rugby fans were suggesting, but it could also be a fracture to the collar-bone which could put him out for 3 months
The fact that he played on, and that he doesn't look like he spent the night in hospital suggests to me it's not broken. There are a lot of delicate, fragile structures in and around the shoulder joint
I really doubt it's that serious Marvin
It certainly isn't a "stinger" injury as some rugby fans suggest. They are nerve injuries sustained as a result of direct contact from the front as occurs in a rugby tackle.
Negredo rolled onto the back of his shoulder as visible by the marks on his shirt at the end of the game and the most likely injury in this case is to the joint between the collarbone and the scapula, the AC joint. Hopefully it is just a sprain and will keep him out for 3 weeks or so. He may benefit from a rest as has played a lot recently and will hopefully be back in time for Barca game nice and fresh.