Novak Djokovic ensured he will remain world No. 1 next week after overcoming a titanic challenge from Stanislas Wawrinka to reach the U.S. Open final for the fourth year in a row.
Novak Djokovic ensured he will remain world No. 1 next week after overcoming a titanic challenge from Stanislas Wawrinka to reach the U.S. Open final for the fourth year in a row.
