BEIJING — Peng Shuai produced the upset of the first round in the China Open on Monday, beating sixth-seeded Venus Williams 7-5, 6-1.
The 30-year-old Chinese wild-card entry broke Williams’ serve twice in the second set.
In other matches, top-ranked Angelique Kerber defeated Katerina Siniakova 6-4, 6-4, No. 16 Elina Svitolina beat Tatjana Maria 6-2, 6-2, Daria Gavrilova beat Christina McHale 6-4, 6-4, and fifth-seeded Karolina Pliskova eliminated Lucie Safarova 6-7 (7), 6-1, 6-4.
Defending champion Garbine Muguruza, the French Open champion who is seeded second, beat Yulia Putintseva 6-2, 7-6 (5) in the second round.
“I’m very happy I could close the match in the tiebreak because obviously it was getting tougher and tougher,” Muguruza said. “Tiebreaks are moments where it’s delicate. You feel a bit more nervous and more tense.”
In the men’s first round, fifth-seeded David Ferrer beat Pablo Cuevas 6-4, 7-6 (3) and No. 7 Roberto Bautista Agut defeated Australian qualifier John Millman 6-4, 3-6, 6-3.
TOKYO — Wimbledon champion Garbine Muguruza advanced to the semifinals of the Pan Pacific Open by beating Caroline Garcia 6-2, 6-4 Friday.
A rare double-fault by the top-seeded Muguruza allowed Garcia to pull even at 3-3 in the second set, but the Spaniard broke back in the next game.
Playing in her first tournament since earning the No. 1 ranking, Muguruza will next face Caroline Wozniacki. The former top-ranked Dane advanced when Dominika Cibulkova was forced to retire with a right thigh injury while trailing 3-6, 7-6 (5), 3-1.
Also, Angelique Kerber upset second-seeded Karolina Pliskova 7-6 (5), 7-5. The seventh-seeded Kerber took advantage of several unforced errors by the Czech player and won with a powerful cross-court shot on her fifth match point.
Kerber will face Anastasia Pavlyuchenkova in the semifinals. The Russian beat Barbora Strycova 5-7, 6-3, 6-1.
METZ, France — French player Benoit Paire came out on top of a tight battle with David Goffin to reach the semifinals of the Moselle Open on Friday after saving one match point.
Paire edged the 2014 champion 7-6 (3), 5-7, 7-6 (7) after nearly 2 1/2 hours at the indoor tournament.
Goffin led 4-2 in the decider and failed to convert a match point at 6-5 in the tiebreaker.
Paire will next be up against Nikoloz Basilashvili of Georgia.
The other semifinal will pit Mischa Zverev against qualifier Peter Gojowczyk.
The fifth-seeded Zverev defeated lucky loser Kenny de Schepper 7-5, 7-6 (4) while the 95th-ranked Gojowczyk needed less than one hour to beat Marius Copil 6-2, 6-4.