Day 9 of the US Open 2019 saw Roger Federer get stunned in the quarter-final clash against Grigor Dimitrov in a five-set duel.
Federer also saw his dear friend Stan Wawrinka bite the dust.
However, Serena Williams marched on to book a semi-final berth.
Elina Svitolina also advanced.
Here are the key 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.
💯 wins in Flushing Meadows...@serenawilliams defeats Wang 6-1, 6-0 and storms into the semifinals!#USOpen pic.twitter.com/cOMsS5bD0G— US Open Tennis (@usopen) September 4, 2019
💯 wins in Flushing Meadows...@serenawilliams defeats Wang 6-1, 6-0 and storms into the semifinals!#USOpen pic.twitter.com/cOMsS5bD0G
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.
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