U.S. Open Updates: Novak Djokovic Defaults Serena Williams Advances

SI senior writer Jon Wertheim shares the latest on the U.S. Open

After a busy weekend for the U.S. Open, it seems to be anyone's tournament on the men's side after Novak Djokovic was defaulted after accidentally hitting a line judge with a ball. On the women's side Serena Williams has advanced to the quarterfinals after a big win on Monday. SI senior writer Jon Wertheim shares the latest on the U.S. Open.