TORONTO: Roger Federer’s number one ranking slid into the danger zone as the Swiss suffered an opening-match loss to Gilles Simon 2-6, 7-5, 6-4 in the second round of the Rogers Cup tennis tournament on Wednesday.

After starting 2008 with a lead of 1,445 ranking points over Rafael Nadal, an off-the-boil season, which now counts 10 defeats in 53 matches, has Federer facing the possibility of losing the top spot he has held for 234 weeks since 2004.

“It’s a bad start, no doubt,” said Federer. “I wish it could have been different. Now I’m going to get some practise in.”

While Nadal cannot take over the top spot even with a second title in Canada, site of his first career hardcourt crown, the pressure is now huge on 12-time Grand Slam champion Federer.

Only a few hundred points will separate the leading pair if Nadal does well this week. The Swiss went out in the first round just under five months ago, losing to Andy Murray in Dubai in early March, and was sent packing again in his first match since surrendering his Wimbledon crown to Nadal, who reached the third round in Canada on after a day delayed six hours by rain.

Nadal waited out a six-hour rain delay but won his 25th match in a row, beating Jesse Levine 6-4, 6-2. “Today wasn’t my best match obviously, but I didn’t feel very bad after the beginning,” said the Spaniard.

“I know it’s a tough tournament, and I’ll have to play better tomorrow. If not, I’ll have a lot of problems.”

Nadal now faces Russian Igor Andreev, who upset 16th seed Tomas Berdych 6-4, 3-6, 6-4.

Simon was fresh off the Indianapolis title last weekend and could not believe his success over Federer in their debut meeting when he broke the Swiss five times. “I don’t know what to think. This is just unbelievable to beat Roger like this,” said the 23-year-old Frenchman who is ranked 22nd in the world.

Federer is determined to fix what’s wrong with his game. “It’s important to stay positive. The hard court season just started and we have nine months of it,” Federer said.

“The bigger picture is the Olympic Games and the US Open. Those are really the places where I want to win, so I have to make sure I’m ready,” he added.

Four other seeds advanced with number four Nikolay Davydenko putting out German Tommy Haas 6-3, 7-6(8/6) and David Ferrer beating American Robby Ginepri 6-4, 6-4. Seventh seed James Blake overhauled Swede Jonas Bjorkman 1-6, 6-1, 6-2 and Richard Gasquet earned a win for France over Andrey Kudryavtsev 7-5, 6-3.

Wednesday’s results (x denotes seeding):

2nd rd:

Rafael Nadal (ESPx2) bt Jesse Levine (USA) 6-4, 6-2; David Ferrer (ESPx5) bt Robby Ginepri (USA) 6-4, 6-4; Marin Cilic (CRO) bt Tommy Robredo (ESPx12) 6-3, 6-4; Richard Gasquet (FRAx10) bt Andrey Kudryavtsev (RUS) 7-5, 6-3; Robin Soderling (SWE) bt Fernando Verdasco (ESPx13) 6-4, 6-7(4/7), 6-4; Jose Acasuso (ARG) bt Fernando Gonzalez (CHIx14) 6-3, 3-6, 6-3; Igor Andreev (RUS) bt Tomas Berdych (CZEx16) 6-4, 3-6, 6-4; Dmitry Tursunov (RUS) bt Feliciano Lopez (ESP) 6-3, 7-6(8/6); Gilles Simon (FRA) bt Roger Federer (SUIx1) 2-6, 7-5, 6-4; Nikolay Davydenko (RUSx4) bt Tommy Haas (GER) 6-3, 7-6(8/6); James Blake (USAx7) bt Jonas Bjorkman (SWE) 1-6, 6-1, 6-2; Andy Murray (GBRx8) bt Thomas Johansson (SWE) 6-4, 6-4; Stanislas Wawrinka (SUIx9) bt Marat Safin (RUS) 6-3, 6-4; Nicolas Kiefer (GER) bt Mikhail Youzhny (RUSx15) 7-6(7/4), 7-5.

1st rd: Marat Safin (RUS) bt Sam Querrey (USA) 6-3, 6-3.