|2020 US Open|
|Venue: Flushing Meadows, New York Dates: 31 Aug-13 Sept|
|Coverage: Selected live radio and text commentaries on BBC Radio 5 Live Sports Extra, BBC Sounds, the BBC Sport website and app.|
Last year's US Open runner-up Daniil Medvedev saw off fellow Russian Andrey Rublev in straight sets to reach the semi-finals at Flushing Meadows.
He won 7-6 (8-6) 6-3 7-6 (7-5) to set up a meeting with Austrian second seed Dominic Thiem.
Medvedev, who was beaten by Rafael Nadal in the 2019 final, was dominant on Arthur Ashe Stadium despite needing a medical timeout in the final set.
The 24-year-old third seed is yet to drop a set in New York this year.
"It was a very tactical game and I am very happy to go through," he said.
Thiem, 27, booked his place in the US Open last four for the first time with a comprehensive 6-1 6-2 6-4 victory over Australian Alex de Minaur in just over two hours.
With Swiss great Roger Federer and Spanish world number two Nadal not competing at Flushing Meadows, and Novak Djokovic - the other member of the 'big three' - disqualified, Medvedev and Thiem will join a semi-final line-up without a Grand Slam title between them.
There will be a first new winner of a men's Slam since Marin Cilic won the US Open in 2014.
"I guess it's somewhere in the back of the heads of all four remaining players," said Thiem, a three-time Grand Slam finalist.
"There may not be Novak, Roger and Rafa but there is Daniil, Sascha [Zverev] and Pablo [Carrena Busta].
"They are three amazing players and every one of us deserves this first title. We will give it our all. Once we step on the court we will forget about the other three."
Medvedev beats power outage and injury
A tense opening set was briefly interrupted by a power outage and play was suspended with Rublev leading 6-5.
Rublev then had a 5-1 advantage in the tie-break, but was unable to close out and smashed his racquet on the court as he conceded the first set.
Medvedev broke to make it 4-2 in the second and frustration continued to creep into his opponent's game, with Rublev issued with a code violation for verbal abuse as he went 5-2 behind.
At two sets up, Medvedev was looking comfortable but the 24-year-old began to show signs of cramp and twice needed treatment.
He still looked to be struggling slightly in the tie-break but was able to close out as a Rublev backhand dropped wide at match point.
"It is maybe the first time in almost a year that I actually celebrated my win," he said.
"Because I felt like I could get in trouble, one point decided two sets. Andrey was playing unbelievable, so I am really happy with my win."
- Williams comes from behind to reach last four
- Williams & Osaka target 2018 rematch
- Azarenka into first Grand Slam semi-final since 2013
- 'Without your gutsy actions, we wouldn't be here today' - Andreescu's open letter to 'Original 9'
- Radio 1's Live Lounge: Listen to unique tracks from Stormzy, Miley and Biffy Clyro
- My Sister the Serial Killer: Fiendishly funny true crime