Barcelona:Michael Phelps and Ian Thorpe each staked their claim to being the world's best swimmer in Barcelona. Thorpe, 20, won his second gold medal of the world championships by retaining his 200-metre freestyle title. 'Thorpedo finished in 1 minute, 45.14 seconds, coming from behind to beat Van den Hoogenband (1:46.43). Thorpe's fellow Australian, Grant Hackett, took the bronze medal. Later, Michael Phelps of the US improved on his old record of 1:54.58 set at the 2001 worlds in Fukuoka, Japan, with a time of 1 minute, 53.93 seconds in the 200m butterfly semi-finals. Phelps plans to swim six events and is a threat to land a medal in each one.