World number one Rafael Nadal pulled out of the Paris Masters on Friday before his quarter-final with a knee injury.

The Spaniard, who had his right knee strapped during his third-round win on Thursday, said he wanted to try and be ready to face Filip Krajinovic in the last eight but that “it wasn’t possible to play”.

He did not say if he would be fit to play at the World Tour Finals in London later this month.