Australia's five-time Olympic champion Ian Thorpe finished seventh in the 100m individual medley final on his return to competitive action in Singapore.
The 29-year-old, who quit the sport five years ago, clocked a time of 56.33 seconds at the World Cup meeting.
Thorpe, who is bidding to swim at next year's London Olympics, had earlier qualified sixth fastest. He will race in the 100m butterfly today, before heading to the World Cup events in Beijing and Tokyo.
Thorpe bettered his qualifying time of 56.74sec in the medley final but was off the pace set by 19-year-old South African Chad Le Clos, who won in 53.06sec.