ST. PETERSBURG, Russia (AP) — Top-seeded Mikhail Youzhny of Russia beat Rajeev Ram of the United States 6-1, 6-4 to advance to the quarterfinals of the St. Petersburg Open on Thursday.
Third-seeded Martin Klizan of Slovakia also reached the final eight, beating Simone Bolelli of Italy 6-3, 6-3.
Klizan hit five aces and never faced a break point. He will next play Ricardas Berankis of Lithuania, who advanced when eighth-seeded Jurgen Zopp of Estonia retired with a back injury after losing the first set 6-3.
Earlier, fourth-seeded Fabio Fognini eliminated 2009 champion Serghiy Stakhovsky of Ukraine 7-6 (4), 6-4, while fellow Italian Flavio Cipolla made the final eight with a 6-2, 6-7 (5), 6-3 victory over Grega Zemlja of Slovenia.
Youzhny, the 2004 champion and a two-time runner-up, served hard in the first set and allowed Ram to score only three points on receiving. Youzhny then made a break in the opening game of the second set and held his serve to close the match on his first match point.
"I've opened really strongly and it was enough to win the set," Youzhny said. "It was much easier in the second set after I made a break."