Sixth seed Hyeon Chung of South Korea made it back-to-back quarter-finals at the Winston-Salem Open on Wednesday, beating Italian Matteo Berrettini 6-3, 3-6, 6-3.

Chung, the reigning Next Gen ATP Finals champion, broke in the eighth game of the third set and then held to 15 to advance past the Roman, who won his maiden ATP World Tour title last month on clay in Gstaad.

“It was a really tough match against a big server. I had never played him before. I was just trying to focus on every point,” Chung said.

The 22-year-old from Suwon will next meet second seed Pablo Carreno Busta, who saved all five break points and beat 16th seed Peter Gojowczyk 6-2, 7-6(5). It will be their first FedEx ATP Head2Head meeting.

Home favourite Steve Johnson ended the run of #NextGenATP Spaniard Jaume Munar 6-4, 6-4. Johnson, a champion in Houston and Newport earlier this year, didn’t face a break point and is through to his fifth quarter-final of the season.

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The four-time ATP World Tour champion will next meet third seed Kyle Edmund, who also didn’t face a break point and beat Spain’s Roberto Carballes Baena 7-5, 7-5.

Chile’s Nicolas Jarry advanced to his first ATP World Tour quarter-final on hard courts and his seventh overall this season by beating 2017 semi-finalist Jan-Lennard Struff of Germany 6-2, 6-2.

“It was a very solid performance. I served very well, and I even returned a lot his serves. He’s a great server, great groundstrokes, very powerful, and it was tough to keep up but I was able to manage well his speed,” Jarry said.

The 14th seed will next play Japan’s Taro Daniel, who went 2-0 on Wednesday. Daniel beat American Sam Querrey 3-6, 7-5, 7-6(3) in a match that was postponed because of rain on Tuesday night. The Japanese right-hander then advanced past German Dominik Koepfer 7-6(4), 7-6(3).