Door opens a bit for Murray

Andy Murray, fresh off his Olympic win over Federer, had a sore knee that was bugging him, but he played well in Cincinnati, so it might be getting better.

But Rafael Nadal's knee is still too painful for him to play in the U.S. Open.  So now Murray has just Federer and Djokovic to contend with in September in New York -- and he beat both of them at the Olympics.

On grass, of course.  But he knows he can beat them both in the same tournament.  So he's got a fighting chance of getting my prediction right (that he'd win at least one Grand Slam this year).