sentences:  Kehlhoffner competed at the 2005 World Championships in the men's singles and doubles event, but was defeated in the first round both in singles and doubles event.He also qualified to play at the 2006 World Championships in the men's doubles event with his partner Thomas Quéré, but the duo defeated by the German players in the first round.In 2007 he competed in the men's singles event, and was defeated in the first round by Richard Vaughan of Wales, 21–9, 22–20.