Maria Sharapova is used to having to rebuild from scratch after suffering a string of debilitating injuries throughout her career, but the Russian is still surprised at how well she is playing in her latest comeback at the WTA Finals.
The second seeds went down to Wayne Black and Kevin Ulyett in the Pacific Open ATP Tennis Masters.
Kei Nishikori swept aside Rafael Nadal in the quarter-finals of the Rogers Cup.
Former world number ones Lleyton Hewitt and Jennifer Capriati were also shown the exit door in the Nasdaq 100 Open.\n\n
Bhupathi and partner Max Mirnyi advanced to the second round in the ATP Tennis Masters while Paes and Divid Rikl lost in the first.
Mumbai Indians scored a 15-run victory over Delhi Daredevils in a must-win match at the Wankhede stadium in Mumbai, on Friday, to stay in the hunt for a play-off berth in the Indian Premier League. They squandered an electrifying start from openers Michael Hussey and Lendl Simmons, losing their last eight wickets for 33 runs before being dismissed for 173 runs in 19.3 overs, but did well to restrict Delhi to just 158.
Former US Open champion Juan Martin Del Potro underlined his status as a dark horse for next week's Australian Open by hammering Dmitry Tursunov to reach the final of the Sydney International on Friday.
After a rough past couple of months that included a tight loss to Maria Sharapova at the French Open and an injury-enforced withdrawal from Wimbledon, World No 3 Victoria Azarenka enters the Southern California Open as hungry as ever.
The former world No.1 has pulled out of all five events he had entered this year.
The world No. 1 needed just 85 minutes to defeat Mark Philippoussis in the final.
What a year Sania Mirza, Leander Paes, Saina Nehwal, Vijender Singh and Anirban Lahiri had!
After shocking top seeds Knowles and Nestor, they were beaten by the Bryan brothers in the Masters Series.
They meet Mark Knowles-Daniel Nestor in the quarters of the ATP Tennis Masters.
The Belgian rallied from the brink of defeat to beat Amelie Mauresmo in the final of the Romes Masters.
Roger Federer got his delayed hardcourt season off to a positive start with straightforward 6-3, 7-6 (7) win over Germany's Phillip Kohlschreiber to ease into the third round of the Western and Southern Open on Tuesday.
Dwayne Smith cracked a blistering 79 as a dominant Chennai Super Kings steamrolled Delhi Daredevils by eight wickets for their sixth straight win in the Indian Premier League.
There comes a moment in all great sporting careers when the puzzle fits together and for Kei Nishikori it arrived on a sweltering early September afternoon in New York.
World number one Novak Djokovic and number two Andy Murray crashed out of the Western and Southern Open within an hour of each other on Friday, before Rafa Nadal restored order with a win over old rival Roger Federer.