The 25-year-old, who sustained the injury in training last month, was operated on at a clinic in Barcelona, Barca said in a statement.
Netherlands coach Bert van Marwijk said last week he was convinced Afellay would be fit in time for next year's European Championship in Poland and Ukraine and that he was a key part of the squad.
'I don’t think he’s good enough, passing often goes wrong. We are somewhat limited up front but even then, you have to earn your selection, and I think he doesn’t deserve that now.' Manchester United star Joshua Zirkzee slammed by national team manager
'Manchester United look confused about what they're being asked to do - he's certainly not getting the best out of them., I wouldn't bet a single penny on them getting to the next round' Alan Shearer issues damning verdict of Europa League hopes
