Dwain Chambers Factfile
We look at the eventful career of sprinter Dwain Chambers after the CAS ruling.
Last Updated: 30/04/12 4:40pm
After a CAS ruling meant he can now be selected for Great Britain's team this summer's Olympics, we look at the eventful career of sprinter Dwain Chambers.
1978: Born Islington, London, April 5.
1998: Takes 100 metres silver in European Championships and is third in World Cup.
1999: Runs 9.99 seconds to become the second European sprinter to break the 10-second barrier after Linford Christie. Runs 9.97secs to claim bronze at the World Championships in Seville.
2000: Fourth in Olympics final in Sydney.
2002: Gets off to a bad start in the Commonwealth Games 100m final and pulls up with cramps, later attributed to lack of fluids.
Takes gold at the European Championships and adds a superb run to bring the British team home for gold in the 4x100m relay.
2003: August 25 - Finishes fourth in the World Championships 100m final in Paris in a time of 10.08.
October 22 - Revealed to have tested positive for newly discovered 'designer steroid' tetrahydrogestrinone (THG). Denies knowingly taking the drug.
November 7 - IAAF suspend Chambers pending disciplinary hearing, after B sample tests positive.
2004: February 22 - Handed a two-year worldwide ban due to expire on November 7, 2005 and a BOA lifetime suspension from the Olympics.
2005: December 10 - Admits using THG for 18 months before failing his drug test including when he became double European champion in August 2002.
2006: June 10 - Cleared by UK Athletics to make comeback.
June 11 - Returns to action at Gateshead, finishing third in 10.07. His time is the fastest by a European in 2006.
June 26 - All performances since January 1, 2002 annulled, including individual and relay gold at the European Championships in Munich in 2002 and the European record of 9.87 he shared with Linford Christie, after his admission to using THG prior to his failed drugs test.
August - Selected to represent Great Britain at the European Championships in Gothenburg.
Finishes seventh in the individual event before joining Mark Lewis-Francis, Darren Campbell and Marlon Devonish in the 4x100m sprint relay squad. The quartet win gold but their achievement is overshadowed by Campbell's refusal to celebrate on a lap of honour with his team-mates, saying it would be "hypocritical".
2007: March - Secures a contract with NFL Europa side Hamburg Sea Devils.
2008: January - UK Athletics chief executive officer Niels de Vos claims Chambers will be barred from making a comeback because he has not undergone drug testing since November 2006 when he left the sport. The IAAF claim he is eligible to run because he never retired from athletics.
February 2 - Qualifies for the World Indoor trials in Sheffield by winning the 60m at the Birmingham Games in 6.60.
February 5 - Allowed to compete in Sheffield after UKA grudgingly accept his entry after the athlete's solicitors prepared to launch a High Court injunction against them.
February 10 - Storms to victory in the 60 metres in Sheffield to book himself a spot at the following month's World Indoor Championships in Valencia.
March 7 - Wins a silver medal in the World Indoor Championships.
May 6 - After a month-long trial with Super League side Castleford, the club reveal he will not be offered a contract.
June 4 - Wins his first 100m race since August 2006 in Greece.
June 30 - 200 past and present athletes, including Dame Kelly Holmes and Sir Steven Redgrave, sign a petition against Chambers being picked for the Beijing Games after his lawyers confirm plans for a High Court appeal against the BOA's lifetime Olympics ban.
July 3 - Court proceedings are launched by Chambers' legal team.
July 12 - Wins the 100m at the Aviva UK National Championships, the qualifying event for the British Olympic team.
July 18 - Chambers' attempt to gain a temporary injunction against the BOA ban is rejected at the High Court to end hopes of competing in Beijing.
2009: March - Wins gold over 60m at the European Indoor Championships in 6.46s.
Causes further controversy later in the same month after alleging in his autobiography that drug use is widespread within athletics.
August 16 - Finishes sixth in the 100m final at the World Championships in Berlin as Usain Bolt breaks the world record, pulls out of the 200m with a calf injury.
2010: March 13 - Wins world indoor gold over 60m in Doha.
June - Clocks 9.99 to win the 100m at the European Team Championships in Bergen, his first sub-10 clocking since 2001.
July 28 - Finishes a disappointing fifth in the 100m final at the European Championships in Barcelona.
2011: March 6 - Wins silver at the European Indoor Championships in Paris.
August 28 - Disqualified in the semi-finals of the 100m at the World Championships in Daegu for false-starting.
2012: March 10 - Wins bronze at the World Indoor Championships in Istanbul.