SONY OPEN UPDATE
Today I went to the same practice court where yesterday a large crowd waited in vain for Roger (Roger!) Federer, and there was another large crowd waiting, this one for Novak Djokovic (pronounced "Novak Djokovic"). There was a guy on the court, but it wasn't Djokovic; it was this guy skipping rope.
He also did some stretching exercises. This one is for professionals only.
I'm not sure why he felt the need to warm up; the temperature was 18,000 degrees. Random spectators were bursting into flames. We stood around perspiring for quite a while, and I was beginning to think that "Novak Djokovic" was an imaginary character you never actually see, like the Easter Bunny or Roger Federer. But then Djokovic actually appeared and commenced whacking the ball with the warmup guy, to the great excitement of those members of the crowd who had not expired.
Everybody took lots of pictures.
Tennis appears to be a sport where the fans don't need actual competition: They just want to see the stars. I think they'd have been happy if Novak just showed up and did some situps, or pruned a hedge, or repaired a washing machine. Which for the record would still be more exciting than golf.