Former champion Maria Sharapova survived a first-round scare before roaring back to beat British teenager Heather Watson 3-6 7-5 6-3 at the US Open on Monday.
French Open champion Li Na was upset 6-2 5-7 7-6 by Czech qualifier Petra Cetkovska in the semi-finals of the New Haven Open on Friday.
The US Open will start on Monday as planned after the National Tennis Center escaped serious damage from Hurricane Irene, officials said on Sunday.
The usual last-minute preparations for the US Open were aborted Saturday as Flushing Meadows was shut down in anticipation of Hurricane Irene, which hit New York this weekend.
Serena Williams was seeded a lowly 28th for the Aug. 29-Sept. 11 US Open as tournament organisers opted to rigidly follow the current rankings rather than reward her for outstanding past performances.
Novak Djokovic was paying the price for sustained excellence on Sunday, but after retiring injured from the Cincinnati Masters final the weary and aching world No 1 vowed to bounce back at the US Open.
The Lake Malaren Shanghai Masters will swing away with 30 of the world's top golfers competing for $5 million in prize money, between Oct 27-30.
Australian Samantha Stosur has bucked the trend of on-court coaching and the world number 10 believes she benefits from managing matches on her own.
Grand slam title holders Li Na and Petra Kvitova were knocked out of the Cincinnati Open on Thursday while Russia's Maria Sharapova and Vera Zvonareva moved into the quarter-finals.
Novak Djokovic has been out of this world this season but the world number one says he is still just flesh and blood.
Roger Federer is relaxed about turning 30 on Monday, despite having slid to third in the world rankings and the chance that this will be the first year since 2002 in which he does not win a Grand Slam title.
Former world No 1 Martina Hingis expressed doubts on Monday on any surprise participation at the 2012 London Olympics, the five-time Grand Slam winner content with her life after tennis.