At the Beijing Olympics Don failed to finish after exiting the swim in 48th place (out of 55) and was pulled out of the race by officials for being too far behind on the bike leg.

[citation needed] On 3 September 2006 in Lausanne Don became World Champion after finishing 17 seconds in front of Hamish Carter.

[citation needed] However his performance was overshadowed by a three-month ban a few weeks later for missing three out of competition drug tests within an 18-month period prior to the race.

[2] The BOA appeals panel whilst clearing Don to compete in future Olympic Games criticised him for being "indisputably careless and irresponsible".

[citation needed] Don won the 2007 London Triathlon in a time of 1 hour 42 minutes 1 second on 5 August 2007.