Injured Raonic withdraws, Sock wins at Delray Beach

DELRAY BEACH, FLA. >> Top-seeded Milos Raonic withdrew from the Delray Beach Open final Sunday after injuring his hamstring a day earlier, giving the title to Jack Sock.

Raonic slightly tore his right hamstring Saturday night, feeling a sharp pain while chasing down a drop shot in his semifinal victory over Juan Martin del Potro.

Raonic tried to ignore the discomfort, opting to go to sleep and hoping he would feel fine in the morning. Instead, after getting two hours of treatment, the 26-year-old Canadian ranked fourth in the world hobbled onto a practice court where Sock was warming up and announced he would be unable to play.

The third-seeded Sock wound up with his second title of the year and moved up to a career-best 18th in the ATP rankings. The 24-year-old also won last month in New Zealand and helped the U.S. reach the quarterfinals of the Davis Cup.

Sock is 11-1 this year, with his only loss to Jo-Wilfried Tsonga in the third round of the Australian Open.

Only Roger Federer, who won the Australian Open, has a better winning percentage that Sock this year. He also helped lead the U.S. to the Davis Cup quarterfinals with a first-round win over Switzerland.

Rio Open

RIO DE JANEIRO >> Dominic Thiem claimed his eighth ATP singles title and his sixth on clay with a 7-5, 6-4 victory over Pablo Carreno Busta of Spain in the Rio Open final on Sunday.

The Austrian is ranked No. 8 by the ATP and was seeded second in Rio. But he became the favorite as soon as topseeded Kei Nishikori was beaten in the first round.

Thiem now heads to this week’s Mexican Open in Acapulco where he is the defending champion in the hard-court tournament.

Carreno Busta is now matches against Thiem. winless in four