Former champion Maria Sharapova and last year's runner-up Vera Zvonareva were opening-day winners, while Wimbledon champion Petra Kvitova came up a first-round upset victim Monday at the 2011 U.S. Open.
World No. 1 and defending champion Caroline Wozniacki highlighted Tuesday's second-round winners, while U.S. Open champion Samantha Stosur was an upset victim at the $2.05 million Pan Pacific Open tennis event.
Two-time runner-up Kim Clijsters, quality Belarusian Victoria Azarenka and three-time Grand Slam champion Maria Sharapova were a trio of first-round winners Tuesday at the 2011 French Open.
Top-seeded Roberta Vinci eased into the quarterfinals, while second-seeded Russian Maria Kirilenko and defending champion Anabel Medina Garrigues were second-round losers Wednesday at the $220,000 Estoril Open tennis event.
Slovakia's Dominika Cibulkova advanced, but former Cincinnati champion Jelena Jankovic and ex-French Open titlist Francesca Schiavone were opening-round upset victims Monday at the WTA's $2.168 million Western & Southern Open.
Two-time champion Novak Djokovic, two-time runner-up Roger Federer and reigning titlist Rafael Nadal were among Thursday's third-round winners at the $3.475 million Italian Masters tennis event.
Three-time overall and two-time defending champion Novak Djokovic will lead the charge into the 2013 Australian Open when it commences next week in Melbourne.
Ninth seed Angelique Kerber of Germany rallied to win her first-round match and American Venus Williams breezed into the second round Monday at the $2.369 million Western & Southern Open tennis event.
After enjoying an opening-round bye, former world No. 1 and reigning Australian Open champion Victoria Azarenka was a second- round winner Tuesday at the $2.369 million Western & Southern Open tennis event.