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 either Caroline Wozniacki or Dominika Cibulkova.

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.