Bartoli's rain delay strategy

Anyone who watched Marion Bartoli's defeat of Michaella Krajicek in today's Wimbledon quarterfinal saw a very different Bartoli emerge after the rain delay. Some of us wondered if she watched the first set and studied the shots like she did during her long rain delay in her round of 16 match against Jelena Jankovic. She did not. Instead, she went to sleep. Bartoli said she had not gotten enough sleep the night before, and the rain delay gave her a perfect opportunity to take a nap. She awakened fresh and proceeded to win the next two sets.