TORONTO: Roger Federer's troubled season continued when he followed his crushing loss in the Wimbledon final with a shock defeat by Frenchman Gilles Simon at the Toronto Masters on Wednesday.

Back on court for the first time since his five-set loss to Rafael Nadal at the All-England Club, the world No 1 appeared ready to take out his disappointment on Simon by winning the first four games on the way to the opening set.

But Simon, riding the momentum from his championship win in Indianapolis on Sunday, refused to buckle under the pressure, battling back to beat the 12-time Grand Slam winner 2-6, 7-5, 6-4 and reach the third round.

It was the first time Federer had lost his opening match in a tournament since falling to Briton Andy Murray in Dubai in March.

Roger Federer leaves the court after being defeated by Gilles Simon of France at the Toronto Masters on Wednesday. Reuters

"The hard-court season just started so it is not the end of the world but I wish I could have started better," Federer told reporters. "I like this surface, I like this tournament, I have done well in the past here so it definitely hurts.

"I have to regroup and look forward. The bigger picture is the Olympic Games and the US Open and those are the places I really want to win so I have to make sure I am ready for that."

Another setback

The second-round loss at an event he has twice won was another setback for Federer, who was hoping to use the American hard-court season as preparation for his gold medal bid in Beijing and to re-establish his dominance after a disappointing season.

Federer's No 1 ranking, which he has held for 234 weeks, is also now under serious threat from his great rival Nadal.

The Swiss held a commanding 1,445-point cushion at the top at the start of the year but if Nadal wins in Toronto for a second time on Sunday the deficit will be sliced to less than 300.

The 22nd-ranked Simon represented a tricky opponent for the rusty Federer, who had only resumed practice four days before arriving in Toronto and received a first-round bye.

Simon, meanwhile, was well into his hard-court campaign after claiming his fourth career win and second title of the season in Indianapolis with a straight-sets victory over Russian Dmitry Tursunov.

"I was playing like I was in a dream," Simon said. "I just saw the ball and hit it as hard as possible."

Source:China Daily/Agencies