 Complete the following phrase:  At the 2001 Australian Championships, Harrison won gold and silver respectively in the 200-metre and 100-metre breaststroke to qualify for the 2001 World Aquatics Championships in Fukuoka, Japan. He came sixth and 20th in the 200-metre and 100-metre respectively, despite setting an Australian record in the 200-metre event. He combined with Welsh, Huegill and Ian Thorpe to win gold in the 4×100-metre medley relay. Harrison had a poor year in 2002, managing only seventh in the 200-metre breaststroke at the 2002 Commonwealth Games in Manchester, and being dropped for the 100-metre event and the medley relay. He won gold and silver in the 100-metre and 200-metre breaststroke at the 2003 Australian Championships, but continued to decline, finishing outside the top twenty in both events at the 