Kosuke Kitajima
At the 2003 World Aquatics Championships in Barcelona, Spain, Hansen won gold in the 4×100-meter medley relay, silver in the 100-meter breaststroke, and bronze in the 200-meter breaststroke. In his first event, the 100-meter breaststroke, Hansen finished second to Kosuke Kitajima with a time of 1:00.21. In his second event, the 200-meter breaststroke, Hansen finished in third place with a time 2:11.11. In the 4×100-meter medley relay, Hansen swam his leg with a time of 59.61 seconds and the American squad finished first with a world record time of 3:31.54.