"It's one of those things, I felt a tweak in my knee. Unfortunately it's shown damage in the ligament although it's nothing too serious. The good news is it's not too serious but the bad news is that it could be two to three weeks out."
He told Sky Sports: "I've not given up hope because you don't know how quickly it will heal but realistically I've been told it will be two or three weeks and if that's the case then my tournament is over."