Marcus Fraser and Jason Day have recorded first-round upsets over major champions in the World Golf Championships Match Play Championship but Adam Scott has been bundled out early again for a seventh year running.
Fraser, a two-time European Tour winner, came into the event as the 52nd seed but held off 2011 US PGA Championship winner and 13th seed Keegan Bradley 1-up.
Day, the 41st seed, finished off his hot form from Wednesday by taking just two-and-a-half more holes after the resumption from a snow delay to beat 2007 Masters champion and 24th seed Zach Johnson 6 and 5.
But the news wasn't so good for the other two Australians with sixth seed Adam Scott beaten 2 and 1 by 59th-seeded South African Tim Clark while John Senden was humbled 6 and 5 by American Bo Van Pelt.
Fraser traded holes with Bradley across the entire match with neither player leading by more than a hole.
But a hole-out from the fairway for eagle on the 10th for Bradley looked like it could be the killer blow until Fraser buckled down on the 17th.
He had not led since the second hole of the match, the previous day before the snowstorm.
But faced with a 29-foot putt for birdie with Bradley just eight feet away for his birdie on the second-last hole, Fraser rolled the ball into the cup and watched as Bradley missed.
When the American went from a fairway bunker to the desert and took an unplayable, the Australian was moving on to a second-round date with Swede Fredrik Jacobson.
"It was good. I knew it was going to be obviously a tough match. Keegan is a major winner and Ryder Cup player, so he's used to match play," Fraser said of his win.
"Down the stretch, he's probably one of the best in the game. It wasn't the prettiest match.
"We were probably both around level par, one over maybe but, as I said before, it's match play. You can play really well and get rolled or you can play average and hang in there. And that's what I did today - hung in there and made a nice putt on 17, which really helped."
Day was six-up over Johnson playing the 11th hole after resumption and, although he dropped the par-five to be 5-up, he then halved the 12th before winning the 13th to close out his win.
"I think I missed two greens out of the 13 holes that I played," Day said. "I hit a lot of good quality shots, and I putted great."
Scott missed numerous opportunities to take leads over Clark but couldn't get his putter to cooperate while the South African continually made impressive mid and long-range par putts to hang in the match.
Bogeys on the 16th and 17th for Scott sealed his fate and took his run to seven years without getting past the second round, the fifth time he's been bundled out in the opening match.
Senden didn't get to hang around long after the resumption, watching Bo Van Pelt need just two shots to close out their match.