Libby Lenton will go in as a hot favourite to topple sprint queen Jodie Henry in the 100m freestyle final at the Commonwealth Games trials on Wednesday night.

Lenton sliced a tenth of a second off Henry's world mark in last night's semi-final in a time of 53.42 seconds in Melbourne.

Lenton felt she was better placed to handle the expectation than after she broke the 100m world record for the first time at the 2004 Olympic trials in Sydney.

"I think I have to concentrate on doing my task and doing it to the best of my abilities," she said.

"I think I have some control over that now, a lot better than I had in the past and hopefully it all goes well."

Lenton has never conquered Henry at a major swimming event despite chalking up a win at last year's Duel in the Pool.

Both times that Lenton has broken the world record Henry has been swimming in the other semi-final.

Lenton's response to breaking the mark was not nearly as priceless Tuesday night's as her disbelief at the Athens trials.

"I wouldn't hardly say it is ho-hum," said Lenton.

"The last time was definitely a massive shock for me, this time was still a shock, but I know this time I have to keep my emotions more in check because I know that I haven't made the team for this event yet."

Ian Thorpe will unleash himself in the 100m freestyle heats on Wednesday after comfortably winning the 200m freestyle on Tuesday night.

World record holder Leisel Jones is also in action in the 200m breaststroke.

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