SYDNEY (AFP) - Former world record holder Asafa Powell is eyeing a fast time in his 100m event at this week's IAAF World Athletics Tour in Melbourne after a weekend personal best time in the 400m. In an event he rarely contests, the Jamaican sprinter left his charge until late, coming home strong for fourth place in a PB time of 45.94 seconds in the 400m at the Sydney Track Classic on Saturday. Australia's Olympic semi-finalist Sean Wroe won the event in 45.28 just ahead of American Xavier Carter (45.75), but Powell's finishing spurt was eye-catching. Powell is looking to revive his career after bombing out at last year's Beijing Olympics, where he finished a dismal fifth in the 100m final as fellow Jamaican Usain Bolt smashed Powell's world record with a time of 9.69 seconds. But Powell gave an indication of better things ahead of this year's Berlin world championships when he carved 1.23secs off his previous best time in the Sydney 400m race. He paced himself for the first half and then turned up the tempo to storm from last to fourth place with 150m to go. "I was pacing myself because I knew if I went out too hard I would have died coming home," Powell said. "I'm very, very happy. When I started gaining on them I started to dig and dig and dig and I got very close, but it wasn't enough. "My coach (Steve Francis) said 'cruise for the first 200m and bring it home'. "This tells me I'm a lot stronger this year and it will be a different ball game. "I'm just motivated, the 400m didn't hurt as much as I thought it would. I'm OK. I didn't need the ambulance." Francis, who usually sets Powell just three 400m hit-outs each season, said the purpose was to get him to run well under pressure, as questions have been raised about his mental strength on the big occasions. Powell, 26, has yet to win an individual Olympic or world title despite setting a string of world records. "What happened at the Olympics proved a lot because it was a big contrast between how Asafa did versus other members of his training group," Francis said. "We were able to zero in on what his problems were and I think we have taken steps to hopefully give him a better opportunity to reveal his true abilities. "A lot of it has to do with expectation, a lot of it has to do with his approach to being under pressure. "We have been working to change... and we are hoping that when the time comes he will be better than he has ever been." The World Athletics Tour meet takes place in Melbourne on Thursday.