Doha, Qatar (SportsNetwork.com) - Seventh-seeded Venus Williams upended No. 4 seed Agnieszka Radwanska in Thursday's quarterfinal action at the Qatar Open tennis event.

The former world No. 1 Williams took down the former Wimbledon runner-up Radwanska 6-4, 1-6, 6-3 on the hardcourts at Khalifa International Tennis Complex.

Radwanska also lost to the resurgent Williams in the fourth round last month at the Australian Open.

Williams will meet the Caroline Wozniacki-Victoria Azarenka winner in Friday's semifinals.

The 2015 Doha titlist will claim $124,000.