Mason, OH (SportsNetwork.com) - Reigning U.S. Open champion Serena Williams and French Open runner-up Simona Halep posted third-round victories Thursday at the $2.5 million Western & Southern Open tennis event.
The world No. 1 Williams blew past 13th-seeded Italian Flavia Pennetta 6-2, 6-2 on the hardcourts at the Lindner Family Tennis Center.
The 17-time Grand Slam titlist Williams was last year's Western & Southern Open runner-up to Victoria Azarenka, who lost to the American great in the last two U.S. Open finals.
Williams' quarterfinal opponent will be eighth-seeded former world No. 1 Jelena Jankovic, who got past American Sloane Stephens 7-6 (7-4), 6-4 on Day 4. The Serbian Jankovic titled here in 2009 and was the runner-up in 2011.
Williams is 9-4 lifetime against Jankovic, including a win in Dubai earlier this season.
Meanwhile, the world No. 2 Romanian star Halep humbled 16th-seeded Czech left-hander Lucie Safarova 6-4, 7-5.
An upset came when Ukrainian Elina Svitolina took out 15th-seeded Spaniard Carla Suarez Navarro 4-6, 6-4, 6-4.