Because if he hasn't yet, don't expect him to play even 3 rounds. I have seen him practicing twice at the Open (one of them a set against A.Murray and another against C.Moya) and he was quite noticeably limping in the first one and cut short in the second (against Carlos). He then sat down and looked very subdued talking to Lundgren and a few other people about the knee. Moya was sitting next to him looking very sympathetic. Lundgren looked upset.