Australia's tilt at the US Amateur has come to an end with the loss of Jack Trent in the Round of 32.

Queenslander Trent had a back-and-forth tussle with American Cameron Sisk this morning, but eventually bowed out 3&2.

Trent, based in Nevada with his family for the past handful of years while he studies at the University of Nevada Las Vegas, had progressed smoothly to the second round of match play.

But he soon found himself in a tight scrap with Californian Sisk, who only reached the knockout phase when he won one of three spots to break an 18-man stroke play logjam on Tuesday.

Trent, who has been a member at Headland Golf Club on the Sunshine Coast, three times took the lead in a quality front nine at Bandon Dunes in Oregon.

But each time Sisk hit back, including with a spectacular eagle on the long ninth hole. Sisk, whom Trent rated highly after the pair had played at the recent Western Amateur, then hit the front for the first time at the 11th when the Aussie could only manage a bogey five on what he described the day before as one of the pivotal holes.

Consecutive birdies on the 13th and 14th gave Sisk the whip hand at 3-up.

Sisk's bogey on the 15th momentarily gave Trent heart, but the Aussie couldn't turn the screw and his bogey on the 16th ended the match.

Earlier in the week, fellow Aussies Lachie Barker, Lukas Michel and Connor McKinney had each bowed out in the stroke play phase.

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