Rose knocked out by Colsaerts
Justin Rose became the latest giant to be toppled at the Accenture Match Play Championship in Tucson on Friday.
One of the favourites for the title after the first round defeats of world top two Rory McIlroy and Tiger Woods, fifth seed Rose was beaten 4&2 by Ryder Cup team-mate Nicolas Colsaerts.
And with third seed Luke Donald, winner two years ago, losing four of the first five holes to American Scott Piercy, the shocks looked like coming thick and fast again.
At least Ian Poulter, Donald's predecessor as champion, was going well. He led American Bo Van Pelt by three after 12.
A Colsaerts victory was not that big a surprise in truth.
The Belgian won the Volvo World Match Play in Spain last year, had eight birdies and an eagle in his first-ever Ryder Cup game last September and began this week with a crushing 5&4 win over American Bill Haas.
Rose actually won the first hole, but he could not match his big-hitting opponent's birdie on the long second and by the seventh was already three down.
A birdie at the ninth and eagle on the 11th - both with 14-foot putts - hinted at a comeback, but the Englishman plugged his ball in a bunker on the next and Colsaerts hit his approach to two feet at the 14th.
The 15th was halved in birdie threes - Colsaerts drove the green on the par four - and it ended on the following green when Rose three-putted.
After a 2&1 win over Scot Stephen Gallacher, unbeaten Ryder Cup hero Poulter fell behind to Van Pelt on the fourth, but a tee shot to three feet two holes later turned the tide.
The American fluffed a chip at the next, Poulter birdied the eighth and further wins came at the start of the back nine.
Donald gave Piercy all the encouragement he needed by double-bogeying the opening hole, but losing the fifth had nothing to do with what the world number three did - Piercy sank his approach for an eagle two.
Following Wednesday's freakish snowstorm and then the loss of Thursday morning as well while the course was made playable, it was decided to play only the second round today and then try to cram the last 16 and quarter-finals into Saturday.
The first round actually spilled into a third day, Swede Carl Pettersson overcoming Rickie Fowler at the 19th after the American had birdied the last two, while Spaniard Gonzalo Fernandez-Castano beat Italian Ryder Cup player Francesco Molinari at the last.
Pettersson then took on McIlroy's conqueror Shane Lowry and Fernandez-Castano faced the man who knocked out Woods, his former Presidents Cup partner Charles Howell.
Trying to climb into the world's top 50 to qualify for The Masters - he is currently 68th and needs to make the semi-finals to do it this week - Lowry set off in fine style with a six-foot birdie putt and was still one up after four.
Graeme McDowell, who put out Padraig Harrington in the other all-Irish first round duel, was level after two with another Swede, Alex Noren.