More seeds tumble in Quebec

The seeds continued to tumble out of the WTA Quebec event as Aleksandra Wozniak and Petra Martic became the latest casualties in the third round.

Fourth seed Wozniack followed first and second seeds Dominika Cibulkova and Yanina Wickmayer out of the tournament after she injured her shoulder during the warm-up before her second round encounter with Melanie Oudin.

The Canadian number one and local favourite was forced to pull out, handing American Oudin a walkover. She now plays Kristina Mladenovic of France for a place in the semi-finals.

Seventh seed Martic of Croatia fell to Anna Tatishvili, the Georgian player winning 6-2 6-3 to set up a quarter-final clash with Kirsten Flipkens, who ousted Cibulkova in the first round before seeing off Mirjana Lucic of Croatia 6-7(2) 6-2 6-4.

Number eight seed Lucie Hradecka, however, managed to avoid a slip-up against Canada's Eugenie Bouchard, the Czech winning 7-6(2) 2-6 7-6(4) to book a quarter-final date with America's Lauren Davis, conqueror of Wickmayer in the second round.

Defending champion Barbora Zahlavova Strycova plays Mona Barthel - the highest remaining seed at three - in the last quarter-final match-up.