Pennetta, at 33 the oldest first-time Grand Slam finalist in the Open era, on Saturday became the first Italian to win the US Open women's crown with an efficient 7-6 (4), 6-2 victory over compatriot and childhood friend Roberta Vinci.
No 5 seed Li Na from China moved into the last 32 at 2013 US Open after outscoring Sofia Arvidsson from Sweden 6-2, 6-2 on Wednesday. 
Li Na cleared of doping allegations Li Na breezes into US Open second round
China's tennis queen Li Na has once again found herself at the center of controversy after a recent New York Times profile caused misunderstanding that the 2011 French Open champion took banned substance at the advice of her former coach.
Officers of the Tennis Management Center of General Administration of Sport of China denied that Li Na was once forced to take steroid pills as an article in the New York Times stated.
Samantha Stosur of Australia serves to Victoria Duval of the US during their first round match at the US Open tennis championships in New York, Aug 27, 2013.
Former world number one Caroline Wozniacki reeled off five consecutive games to dig herself out of a hole on Tuesday and safely reach the second round of the US Open.
Former champion Sam Stosur was bundled out of the US Open by American teenager Victoria Duval on Tuesday.
Rafael Nadal blasted the current obsession with fad diets on Monday, especially the moves towards gluten-free eating popularized by Grand Slam rival Novak Djokovic.
China's Li Na cruised into the second round of the US Open on Monday as easily as she has slipped into being a role model for her sport and her homeland.
Venus Williams, nagged by lower-back woes and with only one win since early April, ousted 12th seed Kirsten Flipkens on Monday to reach the second round of the US Open.
With his father banned from the US Open and memories burning of an early surrender in a second-round exit last year, Australia's Bernard Tomic ground out a five-set victory on Monday.
Venus Williams of the US is congratulated by Kirsten Flipkens of Belgium (L) after Williams won their match at the US Open tennis championships in New York, August 26, 2013.
The fifth seed Li Na from China breezed into 2013 US Open second round after beating Olga Govortsova of Belarus 6-2, 6-2 on Monday.
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