Seven of the top eight seeds have reached the quarterfinal stage of the Western & Southern Open. On Friday, that field will be narrowed down to the final four. Here’s a preview of the quarterfinal action:
(1) Daniil Medvedev vs  Pablo Carreno Busta
Daniil Medvedev is playing a hot hand, but his quarterfinal opponent happens to be the last man to beat him: Pablo Carreno Busta. Medvedev has won eight straight matches in Cincinnati having claimed the title here in 2019, and seven in a row this season after winning the Toronto title last week. Carreno Busta bested Medvedev in the Tokyo Olympic quarterfinals then downed Novak Djokovic to claim the bronze medal. Medvedev has won three of their five career meetings.
 Andrey Rublev vs Benoit Paire
Benoit Paire is crashing the top seeds’ party with his run this week. Playing his 60th such tournament, Paire is looking to reach the semifinals at an ATP Masters 1000 for just the second time (Rome 2013). He’ll be facing fourth seed Andrey Rublev for a spot in the final eight. Rublev has reached his second straight quarterfinal in Cincinnati. Earlier this summer, he won the Olympic gold medal in mixed doubles.
Casper Ruud vs  Alexander Zverev
The winner of 15 of his last 16 matches – and three ATP titles since Wimbledon – Casper Ruud looks to continue his hot summer when he faces Olympic gold medalist Alexander Zverev. Twice a semifinalist in ATP Masters 1000 events this season, Ruud is looking to improve on his quarterfinal run last week in Toronto after winning his 100th career match on Wednesday. Zverev, runner-up at last year’s US Open, has won 12 of his last 13 hard court matches.
 Felix Auger-Aliassime vs  Stefanos Tsitsipas
The ATP’s youth movement will be on display as 21-year-old Felix Auger-Aliassime faces 23-year-old Stefanos Tsitsipas. A former ATP finals champion, Tsitsipas broke through earlier this year to claim his first ATP Masters 1000 title in Monte Carlo and then reached his first Major final at the French Open. An eight-time ATP finalist, Auger-Alliasime is seeking his second career semifinal at an ATP Masters 1000. Auger-Aliassime was victorious in the pair’s first two meetings, but Tsitsipas has now won four in a row against the Canadian.