ATP roundup: Draper rallies past Tiafoe to reach Stuttgart semis

No. 6 seed Jack Draper of Great Britain racked up 31 aces and rallied to defeat No. 4 seed Frances Tiafoe 5-7, 6-4, 7-6 (1) on Friday to advance to the semifinals of the Boss Open in Stuttgart, Germany.

Draper committed only three double faults while smashing his dominant serves past Tiafoe, the defending champion. The aces enabled Draper to win 53 of 62 first-service points (85.5 percent), including 18 of 19 in the second set.

Draper will face another American, Brandon Nakashima, who advanced via walkover after seventh seed Jan-Lennard Struff of Germany withdrew.

The other semifinal will pit fifth-seeded Italian Lorenzo Musetti against Matteo Berrettini. Berrettini defeated Australian James Duckworth, 6-4, 7-5. Musetti led 4-6, 6-1, 1-0 when Kazakhstan's third seed, Alexander Bublik, retired.

Libema Open

No. 7 seed Sebastian Korda defeated No. 2 seed Tommy Paul 6-4, 6-2, in an all-American quarterfinal in's-Hertogenbosch, Netherlands.

Korda won an impressive 27 of 32 first-service points (84.4 percent) and broke Paul's serve four times in eight chances during the 67-minute match. His next opponent will be Tallon Griekspoor of the Netherlands, the defending champion and sixth seed who defeated Aleksandar Vukic of Australia 4-6, 6-3, 7-6 (4).

The only other match of the day saw No. 1 seed Alex de Minaur of Australia defeat Canadian Milos Raonic 7-5, 6-2. He awaits the winner of Saturday's quarterfinal between France's No. 3 Ugo Humbert and Dutch qualifier Gijs Brouwer.

SportsLigue