U.S. Open: Pouille upsets Nadal in 5-set thriller

Rafael Nadal was upset in the U.S. Open's fourth round by 24th-seeded Lucas Pouille of France 6-1, 2-6, 6-4, 3-6, 7-6 (6) on Sunday, prolonging the 14-time Grand Slam title winner's quarter-final drought at major tournaments.