Olympic champion, Monica Puig moved into the quarter finals of the Toray Pan Pacific Open in Tokyo with a come-from-behind 1-6 6-4 6-4 victory over two-time Wimbledon champion, Petra Kvitova.
Puig has now won both of her career meetings against Kvitova, with her other success over the left-hander coming on her way to Olympic gold in Rio.
The Puerto Rican showed typical grit in fighting back from a set down, and 4-2 down in the deciding set to stun her seventh-seeded Czech opponent in two hours and eleven minutes.
It doesn’t get any easier for Puig, who will battle world number four, Agnieszka Radwanska in the last eight.
Radwanska booked her passage with a 6-3 3-6 7-5 victory over another Czech, Barbora Strycova.
Former world number one, Caroline Wozniacki continued her resurgence with a 7-6 4-6 6-4 victory over Spaniard, Carla Suarez Navarro, while home favourite, Naomi Osaka delighted the Tokyo crowd with a 6-2 6-1 dispatch of Slovakian, Dominica Cibulkova.