Kosuke Kitajima
At the 2007 World Aquatics Championships in Melbourne, Australia, Hansen won gold in the 100-meter breaststroke and silver in the 50-meter breaststroke. Hansen also was entered in the 200-meter breaststroke but did not start. In the 100-meter breaststroke, Hansen won with a time of 59.80 seconds, 0.16 faster than second-place finisher Kosuke Kitajima. This victory made him the first and so far only four-time breaststroke world champion (long course). In the 50-meter breaststroke, Hansen place second with a time of 27.69 seconds, just 0.03 slower than first-place finisher Oleh Lisohor.