BEIJING (AP) — Top-seeded Novak Djokovic needed only 53 minutes to reach the semifinals of the China Open with a 6-1, 6-2 win over Jurgen Melzer on Friday.
Third-seeded Jo-Wilfried Tsonga defeated Mikhail Youzhny of Russia 6-3, 6-2, and Feliciano Lopez of Spain outlasted Sam Querrey of the U.S. 4-6, 6-4, 6-4.
On the women's side, top-seeded Victoria Azarenka and second-seeded Maria Sharapova advanced. Azarenka topped Romina Oprandi 6-2, 6-0, and Sharapova was in charge of Angelique Kerber 6-0, 3-0 when the German retired with a right foot injury.
Djokovic had 12 aces and saved both break points he faced.
"The serve was great," he said. "It's one of the best serving matches I have had in my career, so that's a positive sign."
Djokovic was particularly pleased with serving four straight aces to win the sixth game of the second set at love. Fans went wild after the match when Djokovic signed his name on the TV camera lens in Mandarin.
Djokovic will take on Florian Mayer of Germany in the semifinal on Saturday. Mayer gave himself a big 29th birthday present with a 6-3, 6-4 win over Chinese wild card Zhang Ze.