Roger Federer, renowned for his style, reflected on his biggest fashion faux pas in an interview with GQ.

Federer said he made a glaring wardrobe malfunction over 10 years ago that was picked up by the British press.

Apparently, the error still haunts him to this day.

The Grand Slam tennis champion Roger Federer is renowned for his finesse and style on and off the court, but the 36-year-old is still haunted by a fashion faux pas he made over 10 years ago.

Federer is often seen on the red carpet wearing a tailored suit with a matching tie and manicured hair. He has welcomed comparisons to James Bond, said he would relish seeing Leonardo DiCaprio play him in a biopic, and claimed he would never ever dress like Rafa Nadal.

Federer has picked up 20 of the major titles in the sport and has the celebrity appeal to match — but in an interview with GQ published Wednesday, Federer acknowledged he had been guilty of making public howlers.

Federer recalled what he said was an "embarrassing" wardrobe malfunction at a Wimbledon ceremony that was picked up by the British media.

"Back in 2005 or 2006, I was so excited I won, I wanted to put on the whole outfit that we'd made together," he told GQ. "I went to receive the trophy, and as I walk down I'm a bit nervous, and as I put my hands in my pockets I realise that the pockets are going backwards.

"I was like: 'It's too late! I can't change them anymore!' I lifted the trophy, and the pants were on backwards. You could hardly see it, but I think one British media picked it up and were like: 'What's going on? He's got the zipper at the back.'"

The incident actually occurred in 2007 — and there's photo evidence:

Ryan Pierse/Getty Images

Federer added: "That was quite embarrassing!"

Alex Livesey/Getty Images

Federer has not played competitive tennis since a second-round loss to Thanasi Kokkinakis at the Miami Open in March. He decided to skip the clay season so he could be as fit and as fresh for Wimbledon, which starts in July.

Hopefully this time he'll wear his trousers the right way round.