Oeiras, Portugal - Stanislas Wawrinka recovered from a shaky start to beat Spanish qualifier Ivan Navarro 7-6 (7/5), 6-1 on Wednesday and move into the quarter-finals of the Estoril Open.
The big-serving Swiss saved break points in his first two service games before being broken in the sixth game on a double fault. He broke back immediately and had five set points at one stage in the tie-breaker.
The third-seeded Wawrinka overpowered his opponent in the 20-minute second set, serving out the match in damp and windy conditions at the rain-disrupted clay event.
In the women's event, top-seeded Roberta Vinci advanced to the quarter-finals with a 6-2, 6-0 victory over Maria Joao Koheler of Portugal.
Results on Wednesday from the Estoril Open at Estadio Nacional (seedings in parentheses):
Bobby Reynolds, United States, def. Attila Balazs, Hungary, 6-3, 6-4.
Stanislas Wawrinka (3), Switzerland, def. Ivan Navarro, Spain, 7-6 (7/5), 6-1.
Richard Gasquet (2), France, def. Paolo Lorenzi, Italy, 6-1, 6-1.
Robin Haase (6), Netherlands, def. Inigo Cervantes, Spain, 5-7, 6-4, 6-2.
Daniel Munoz de la Nava, Spain, def. Flavio Cipolla (8), Italy, 6-4, 6-4.
Roberta Vinci (1), Italy, def. Maria Joao Koheler, Portugal, 6-2, 6-0.
Galina Voskoboeva, Kazakhstan, def. Jie Zheng (5), China, 6-4, 6-1.
Kaia Kanepi (6), Estonia, def. Vania King, United States, 6-4, 6-4.
Nadia Petrova (7), Russia, def. Jarmila Gajdosova, Australia, 7-6 (7/2), retired.
Carla Suarez Navarro, Spain, def. Polona Hercog (9), Slovenia, 6-4, 3-0, retired.
Petra Cetkovcka (4), Czech Republic, def. Heather Watson, Britain, 6-3, 6-1.
Silvia Soler-Espinosa, Spain, def. Anabel Medina Garrigues (3), Spain, 3-6, 6-3, 7-5.
Karin Knapp, Italy, def. Maria Kirilenko (2), Russia, 1-6, 6-1, 7-5.