World number one Roger Federer heads to the U.S. Open with a sixth tournament win of the year to his name, no evident fitness problems and little sign that his Olympic defeat by Andy Murray has had any adverse effect on his confidence.
Li Na fought back to beat German Angelique Kerber 1-6 6-3 6-1 and win the Cincinnati Open title, ending her 15-month title drought after French Open triumph.
Roger Federer and Novak Djokovic set up a showdown for the Cincinnati Masters title after cruising to semi-final victories on Saturday.
Li defeats battling Venus to reach Cincinnati final
Li Na defeated a battling Venus Williams 7-5 3-6 6-1 to reach the final of the Cincinnati Open on Saturday after an enthralling 2 hour 9 minutes encounter.
Olympic champion Andy Murray suffered a second pre-US Open setback in as many weeks when he was knocked out of the Cincinnati Open in the third round, losing 6-4 6-4 to France's Jeremy Chardy.
Rafael Nadal withdrew from the US Open on Wednesday increasing concerns about the seriousness of the knee injury.
With Olympic gold safely tucked away, US star sets sights on further glory
Former Wimbledon winner Petra Kvitova claimed her first title of 2012 as she won a battle of ex-Grand Slam champions, beating China's Li Na 7-5, 2-6, 6-3 at the Montreal Masters on Monday.
Petra Kvitova overcame a mid-match slump to claim her first title of the season with a 7-5 2-6 6-3 victory over China's Li Na in the Montreal Cup on Monday.
China's Li Na moved one win away from claiming her maiden title of 2012 after staging an impressive comeback to defeat Czech Lucie Safarova 3-6 6-3 7-5 in the semi-finals of the Montreal Cup on Sunday.
The tale of British tennis player Andy Murray's Wimbledon despair turning to Olympic joy shows the sheer power of the psychological advantage that a supportive home crowd and a gold medal-winning streak by your national team can give. Gold, not tears, this time for Murray