SHANGHAI — Roger Federer ignored recent death threats from a Chinese blogger and won his opening match at the Shanghai Masters on Wednesday, beating qualifier Lu Yen-Hsun 6-3, 7-5 in the second round.
Federer said he was aware that the blogger had recently issued an apology.
The 17-time Grand Slam champion has had heavy security surrounding him at all times since arriving in Shanghai.
Federer saved the one break point he faced and broke serve once in each set to secure his path to the third round. He'll next face 13th-seeded Stanislas Wawrinka.
Novak Djokovic also advanced, beating Grigor Dimitrov of Bulgaria 6-3, 6-2. Two-time defending champion Andy Murray received a walkover into the third round after the withdrawal of Florian Mayer because of a rib injury.
Sam Querrey of the United States rallied past 14th-seeded Kei Nishikori 2-6, 6-2, 6-4 in another second-round match.
At Osaka, Japan, top-seeded Samantha Stosur advanced to the quarterfinals of the Japan Open by beating Virginie Razzano of France 1-6, 6-2, 6-4.
Stosur, the 2011 U.S. Open champion, rallied after having her serve broken three times in the first set at the Utsubo Tennis Center. Razzano had 10 double-faults.
The Australian will next face Jamie Hampton in the quarterfinals. The American defeated wild-card Tamarine Tanasugarn of Thailand 7-5, 7-5.
At Linz, Austria, top-ranked Victoria Azarenka started off her last tournament before the season-ending WTA Championships by beating Arantxa Rus 6-0, 6-2 in the first round of the Generali Ladies.
Two-time former winner Ana Ivanovic also advanced with a 7-5, 6-3 win over Monica Niculescu.
Coming off her win in Beijing, Azarenka dominated the match from the start. The Dutch player double-faulted eight times and won only two points on her serve in the opening set.
Azarenka, who conceded one break and saved three more break points in the second set, will play Simona Halep.
"Being No. 1 means you're more targeted by the other players," Azarenka said. "I just try to stick to my own game."
The 12th-ranked Ivanovic, who won the title in 2008 and 2010, dropped serve once in each set but was in control throughout against Niculescu. Her next opponent is Andrea Petkovic of Germany.
Julia Goerges became the first player to advance to the quarterfinals by defeating Romina Oprandi 6-3, 6-3. Goerges will play Sofia Arvidsson, who defeated Lucie Hradecka 6-4, 7-6 (4).
Patricia Mayr-Achleitner became the only Austrian player to reach the second round by defeating eighth-seeded Sabine Lisicki 6-1, 6-3.