Melbourne: The all-time Grand Slam record-holder, now 32, faces a challenge to remain at the top of men`s tennis after falling to world number six. Federer, with only one major title in the past three years, and just one win last year, started the year by reaching the final in Brisbane where he suffered a shock loss to fellow veteran Lleyton Hewitt. He has enlisted childhood idol Stefan Edberg as a coach this year.

World ranking: 6

Birthdate: August 8, 1981

Birthplace: Basel, Switzerland

Residence: Bottmingen, Switzerland

Height: 6ft 1in (1.85m)

Weight: 187lbs (85kg)

Plays: Right-handed

Turned pro: 1998

Coach: Severin Luthi, Stefan Edberg

Career titles: 77

Grand Slam singles titles: 17

Career prize money: $79,265,175

Best Australian Open result: Champion (2004, 2006, 2007, 2010)