Welsh athletes Mark Colbourne and Nyree Kindred carry GB's greatest hopes for medals on the opening day of the London 2012 Paralympics.
Colbourne, who only took up full-time cycling a year ago, goes in the first of four events he plans to target during the Games.
With the Time Trial, Road Race, Pursuit and Kilo in his sights, he gets the latter underway at a packed out velodrome today.
The Tredegar rider has set the cycling world ablaze since arriving in the sport, two years after a paragliding accident left him partially paralysed.
In the build-up to the Games he has already claimed a World Championship title and world record, meaning he stands as one of Wales' greatest hopes for London.
Nyree Kindred swims in her third Paralympic games in London and has set herself a high standard to match, having won five medals already in a distinguished career to date.
With three events ahead of her she will be hoping to get her 2012 campaign off to a perfect start in the S6 100m backstroke.
The opening day will also see the full contingent of Welsh table tennis players opening their competitions. Sara Head, Paul Davies, Rob Davies, Scott Robinson and Paul Karabardak all feature in the opening rounds of the competition.
Archer Pippa Britton will hope to make it through the qualifying round of the Women's Individual Compound, while sitting volleyball players Sam Scott and James Roberts open Great Britain's account in the preliminary round of that competition.
Wheelchair basketball player Clare Strange will also get her competition underway in the opening round of Great Britain's qualifying group.