 Novak Djokovic easily beat 15th-seeded Holger Ruhn 6-3, 6-4, 6-2 in just over two hours Monday night to reach the Wimbledon quarterfinals. Then he made sure to get a shot to the fans he thought were rooting against him. Ruhn's supporters at various tournaments will often stretch out his last name, saying Ruhn, which sounds similar to boo. And that happened again Monday. During his on-court post-match interview, Djokovic spoke briefly about the match. Then he veered into a discussion about the people in the stands, showing his thin skin amid perceived boos.