World number one Lee Westwood continued his poor run of form at the WGC Accenture Match Play Championship as he was beaten in the second round by Nick Watney, while Martin Kaymer was taken to 20 holes by Justin Rose.
American Watney had beaten Westwood 2&1 in the second round last year, and he repeated the result this time around with a tight 1up win at the 18th.
Westwood has now never been beyond the second round of the event in 11 attempts, and this time it was solely down to his lack of touch on the greens at Dove Mountain in Arizona.
After missing numerous short putts, Westwood then three-putted from close range on 16, when two putts would have won him the hole, although Watney then missed a four-footer on 17 to take it to the last.
It was not to be for the Englishman though who could not get out of jail on the last hole and he was consigned to a second successive defeat to Watney in Arizona.
"I don't really know what happened on 16, having said that I putted very, very poorly all day long, I missed one that length on nine as well so I haven't really made a putt outside five feet," said Westwood.
"So four under for 18 holes is pretty spectacular when you consider how badly I've putted. Those kind of things happen in matchplay, short putts are missed with a little bit of pressure and it's always hard to close a game out.
"I'm playing next week (at the Honda Classic), I'm looking forward to that, I played well there last year. My game's in good shape, I just haven't worked on my putting much recently and it's certainly showed here over the first couple of days."
While the world number one went out, the world number two hard to work overtime to make round three with Kaymer winning on the second extra hole against Englishman Rose.
Kaymer was never behind in the match but Rose dug in to force the German birdie the 20th hole to go through to a match against Hunter Mahan - who put out Robert Karlsson 2up.
Teenager Matteo Manassero followed up his excellent first round win over Steve Stricker by beating South African Charl Schwartzel on the 18th green.
The 17-year-old Italian now goes up against Englishman Luke Donald, who will face his second successive Italian after putting out Ryder Cup team-mate Edoardo Molinari 2&1.
JB Holmes, who only earned a place in the event after injury to Tim Clark on Tuesday, made it into the third round as he upset Ernie Els in a match that went the full 18 holes.
Els saw his putt fail to drop on 18 to allow the big-hitting American to march on to a match-up with Australian Jason Day after his win over Paul Casey.
Bubba Watson put in a spectacular round to defeat Mark Wilson, who put out Dustin Johnson, 6&5, and the big-hitting left-hander now plays Geoff Ogilvy, who ended Thomas Bjorn's tournament a day after the Dane beat Tiger Woods.