US Open 2019: All the major results from Day 9

Ukrainian fifth seed Elina Svitolina got the better off Johanna Konta at the Arthur Ashe Stadium.

The in-form Svitolina won the match 6-4, 6-4.

Konta was forced into making errors and that saw her lose the crucial moments.

"I didn't play badly at all, I was doing a lot of bright things. She just made me play that extra ball, it's frustrating," said Konta.

Serena has staked a claim as the favorite now to win the US Open 2019.

She overcame China's Wang Qiang in straight sets.

She hit 25 winners as she eased to a 6-1, 6-0 win over the 18th seed Qiang.

"I knew I needed to come out and play well. I'm feeling good, had a really tough year and I'm still here," she said.

Five-time US Open champion Federer was stunned by Dimitrov in a five-set thriller.

Federer had enjoyed a healthy record against Dimitrov but this time the Bulgarian had other ideas.

He fought back to clinch the match 3-6, 6-4, 3-6, 6-4, 6-2.

"Clearly in the end he was not at his best. I used every opportunity I had,' said Dimitrov after his win.

Fifth seed Daniil Medvedev battled past a thigh injury to beat Stan Wawrinka.

He reached his first Grand Slam semi-final at the US Open.

Medvedev received painkillers and taping on his thigh in the first set.

He sealed the match 7-6 (8-6,) 6-3, 3-6, 6-1.

"For sure, I hope to be ready for the semis," Medvedev said.