Sir Chris Hoy's career in picturesLast updated on 18 April 201318 April 2013.From the section CyclingIt was gold again at the 2004 World Championships in Melbourne, Hoy defeating Arnaud Tournant of France (left) and Tuen Mulder of the Netherlands in the men's 1km track time trial finalThe same year, Hoy was flying the flag for Great Britain again at the Athens Olympics, collecting his first Olympic gold medal in the 1km track time trialBorn in Edinburgh in 1976, Christopher Andrew Hoy was inspired to cycle at age six by the BMX scene in 1982 film ET. Alongside Craig MacLean (centre) and Jason Queally (right), he won silver in the team sprint at the 2000 Sydney OlympicsIn 2002, Hoy clinched his first gold medal, winning the 1km track time trial final at the Commonwealth Games in ManchesterThe same year, Hoy clinched gold with team-mates Jamie Staff and Craig MacLean in the men's team sprint at the World Championships in Copenhagen, one of two golds at the championships for the ScotMore success followed at the 2008 Beijing Olympics, as Hoy became the first British Olympian for 100 years to claim three golds at one Games, by winning the keirin, the team sprint and the individual sprintThere was less happy news at the beginning of the following year, as Hoy was seriously injured in crashing out of the men's keirin final at the 2009 Copenhagen World Cup, forcing him to miss the World Championships in PolandIn March 2008, Hoy (centre) became the first British cyclist in 54 years to win the world sprint title at the World Championships in Manchester. He also won gold in keirin and silver in the team sprintBritish cycling ended the year on a high as the Beijing Olympic team was named Team of the Year and Hoy (centre) voted Sports Personality of the Year at the annual BBC Sports awards showAnd to complete a remarkable year, Hoy was a awarded a knighthood in the Queen's New Year Honours ListHowever, it wasn't long before he was back to winning ways and he landed his 10th world title in the men's keirin at the 2010 World Championships in Denmark. He also won bronze in the the team sprintAfter announcing his decision not to go to the 2010 Delhi Commonwealth Games in October, Hoy won bronze in the team sprint at the European Championships in PolandAt the 2011 World Championships in Apeldoorn, Netherlands, Hoy (left) had to settle for silver in the keirin. He also won silver in the sprint and team sprint eventsIn February 2012, Hoy (left) took part in the test event for London 2012 at the Olympic Velodrome and won the sprint and keirin finalsAt the 2012 World Championships in Melbourne, Hoy (left) won the keirin final and claimed bronze in the sprintAt the London 2012 Olympics, Hoy became the most successful Olympian in British history by winning his fifth and sixth gold medals in the keirin and team sprint eventsHoy held a news conference in his home city of Edinburgh on Thursday to announce his retirement. "It was not a decision I took easily or lightly, but I know it's the right one."