Third-seeded Jack Sock hopped into the semifinals at the Delray Beach Open on Friday with a 6-4, 7-6(4) victory over fifth-seeded Steve Johnson in Delray Beach, Fla. Sock advanced to Saturday's semifinals to face another American, Donald Young. Young won his quarterfinal match in a walkover after Steve Darcis of Belgium withdrew from the tournament for personal reasons. Top-seeded Milos Raonic of Canada dropped the first set to eighth-seeded Kyle Edmond of Great Britain but came back to claim a 4-6, 6-3, 6-4 victory to reach the semifinals. Seventh-seeded Juan Martin del Potro of Argentina advanced to the semifinals to face Raonic with a 7-5, 7-5 victory over fourth-seeded American Sam Querrey,
Top-seeded Angelique Kerber struggled with a knee injury during a 6-3, 7-6 (3) loss to seventh seed Elina Svitolina in the semifinals of the Dubai Tennis Championships on Friday. Kerber would have reclaimed No. 1 ranking if she won the Dubai title, but that seemed of secondary importance after her loss. "I'm not thinking about this," Kerber said.
Dominic Thiem and Pablo Carreno Busta will face off in the final of the clay-court Rio Open. Thiem defeated Albert Ramos-Vinolas 6-1, 6-4 on Saturday to advance, and Carreno Busta ruined the night of 18-year-old Norwegian Casper Ruud, 2-6, 7-5, 6-0. Ruud was trying to become the youngest to reach an ATP singles final since Kei Nishikori nine years ago.