Re: Nadal Def Dokjovic 6-4 6-4, Djokovic retire !!
Struggling with his lower back for quite a lot of the match...hung in to end the second set then decided he wasn't going to be able to complete the third.
A real shame but given the grass season coming up and no chance at all to win in that sort of shape, perhaps he did the best thing.
Nadal won't mind - even in spite of the problems it still took him nearly 2 hours to get to 2-0 up in sets.
An unexpected bonus and he can recuperate for his semi now.