Australian John Millman defeats Roger Federer

Five-time champion Roger Federer was sent out of the U.S. Open after being defeated by Australia's John Millman on Tuesday.

Millman defeated Federer 3-6, 7-5, 7-6, 7-6 in the Arthur Ashe Stadium in New York.

The 29-year-old will play against Serbia's Novak Djokovic in the quarter-final.

Sharapova loses against Suarez Navarro

Former champion Maria Sharapova was defeated in the fourth round by Spain's Carla Suarez Navarro.

Navarro advanced to the U.S. Open quarterfinal with straight-sets win against Sharapova at 6-4, 6-3.

It was Sharapova's first U.S. Open since the end of her doping ban.

"She played really well. There's a lot of things she did well. I thought in today's conditions, her ball was getting up on me a little bit more, much more than my previous three opponents that I played," Sharapova said after losing the game.

"I know that Maria plays every day here. For me it's totally different, so I'm really happy because I played a really good match. I really enjoyed this crowd, this amazing night session," Navarro said after the match.