Doha, Qatar (SportsNetwork.com) - A battle of former world No. 1s saw Victoria Azarenka whip Caroline Wozniacki, while another mild upset came when seventh-seeded Venus Williams upended No. 4 seed Agnieszka Radwanska in Thursday's quarterfinal action at the Qatar Open tennis event.
The 2012 and 2013 Doha champion Azarenka drilled the third-seeded Wozniacki 6-3, 6-1. Azarenka, performing as a wild card this week, also bested Wozniacki in a second-round match at the Australian Open last month.
The Belarusian Azarenka is now 5-4 lifetime versus the Danish Wozniacki, including wins now in their last three meetings.
The 2014 U.S. Open runner-up Wozniacki was the Doha runner-up in 2011.
Meanwhile, the former top-ranked star 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 Aussie Open.
The 34-year-old Williams will meet Azarenka in Friday's semifinals. The seven- time Grand Slam champ Williams is 4-0 lifetime against the two-time major titlist Azarenka.
The 2015 Doha titlist will claim $124,000.