Manchester City boss, Pep Guardiola has confirmed that IIkay Gundogan will undergo a knee surgery but admitted that he was in no position to put a timescale on his recovery.
Manchester City host Arsenal in a top of the bill EPL match on Sunday without the resourceful midfielder.
The German midfielder was forced off during the first half of City's match against Watford at the Etihad Stadium on Wednesday after colliding with Nordin Amrabat and it is feared he has ruptured a cruciate ligament.
"I think, to be fair, we should wait for a statement from the the doctors," the Spaniard said on Friday during his pre-match Press Conference .
"He will be out for a time, but precisely what he has I think the doctors are the right people to say what he has.
" It's so, so difficult for him, we are sad for him. We are going to miss him a lot . He's unlucky , sometimes in football it happens.
"He's sad, we are sad , we are upset. It was an unlucky situation , sometimes there are situations where the opponents go harder but it was a normal situation.
" He's going to be operated on by the best (doctor) so we will see about the future."