skipping the olympics might be a good call , he's not winning em anyway , but i doubt he'll do it.
as for winning the USO , i think federer's last chance to save the year was at wimbledon; namely i think its all in the djoker's hands now.
if djokovic doesnt win the USO, it would look very stupid.
it depends on the draw. If Nadal can find peak form and Fed can rebound, it will be hard to beat then both.
It was Djokovic all the way until Nadal showed the world that he can beat them all on quicker surfaces by winning at Queens and Wimby.
Nadal will have to skip the olympics to stay fresh.