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.
Seeded sluggers Marin Cilic and Milos Raonic posted opening-round victories, while Frenchman Gilles Simon went by way of the upset Monday at the $3.465 Monte Carlo Masters, the third ATP Masters 1000 event of the season.
Former U.S. Open champion Juan Martin del Potro and heavy French favorites Jo-Wilfried Tsonga and Richard Gasquet were a trio of second-round winners Tuesday at the $3.465 Monte Carlo Masters, the third ATP Masters 1000 event of the season.
World No. 1 star Novak Djokovic and eight-time reigning champion Rafael Nadal were a pair of second- round winners Wednesday at the $3.465 Monte Carlo Masters, the third ATP Masters 1000 event of the year.
If the U.S. Open can produce a 1-versus-2 women's final in two weeks, then top-ranked Serena Williams would meet former No. 1 Victoria Azarenka in a rematch of last year's blockbuster championship match.