Quarter final places were up for grabs on Wednesday at the Sony Open. In the first match 3rd seeded Agnieszka Radwanska took on 10th seeded Dominika Cibulkova. Both players had byes in the first round. Radwanska then won two rounds in straights before having a real battle with the unseeded 42nd ranked Elina Svitolina before winning 7-6(7-5) 5-7 6-2. Her opponent’s route was also two straight sets victories and a three setter against Venus Williams which she won 6-1 5-7 6-3. The Slovak beat the Pole easily in the semis in the Aussie Open this year 6-1 6-2, so Aga was out for revenge. She broke to lead 3-2 and went on to break again for 5-2 with her serve to come. Both players battled to hold their serves in the second set and it went to a breaker, which the Slovak won 7-5. She began the decider and broke to lead 2-0, but the Pole levelled. After 3-3 Cibulkova took the next three games for a 6-3 set and her place in the semis after two hours and forty minutes – and be in the WTA top ten.
The night match was between 2nd seeded Na Li and 11th seeded Caroline Wozniacki. Both had byes in the first round and Li got to the quarters by a 2nd round walkover and two straight sets wins over Madison Keys and 15th seed Carla Suarez Navarro. Wozniacki had a three setter in the second round, lost only one game against 17th seeded Sloane Stephens and did the same to Vivara Lepchenko in the 4th round. The Dane started and held before Li broke twice to lead 4-1. Wozniacki then won four games in a row, but Li broke to level at 5-5 and took the next two games for the set at 7-5. Games went with serve in the 2nd set until Wozniacki (who had a medical time out at 2-2) broke for 5-3, but Li fought back, taking the next three games to take the set 7-5 and move into her first Miami semi.