It was the fall of the favourites as Ryder Cup captain Tom Lehman knocked out holder David Toms, while Tiger Woods and Phil Mickelson were both ousted in a day of upsets at the WGC-Accenture Match Play Championship.
World No 1 Woods, bidding for his third title of the year in four starts, struggled with his putting before losing a tight battle with Chad Campbell by a hole.
Left-hander Mickelson, who never led at any stage of his match with Britain's David Howell, went out 3&1 at a sun-drenched La Costa Resort and Spa. There were also victories for Davis Love, who beat fellow American Chris DiMarco 3&2, and Ireland's Padraig Harrington, who overcame Vijay Singh after 19 scrappy holes.
World No 3 Retief Goosen, who shaded Briton Luke Donald by a hole, was the only player among the tournament's top-10 seeds to book a place in the quarter-finals.
Lehman sealed a 4&3 win with a 15-foot birdie putt at the 15th. Toms, who crushed compatriot DiMarco 6&5 in last year's final, narrowly missed a 14-footer to keep alive his eight-match winning streak in the event.
"It's always nice to win a match, especially against a player of the calibre of David Toms," a smiling Lehman said.
In the day's feature match, twice champion Woods battled was three down with eight to play before mounting a rally. He chipped in for an eagle-three at the 11th and won the 12th with a par.
Campbell countered with a birdie at the par-four 13th to restore his two-hole advantage.
But he effectively gifted the next hole to Woods, finding thick rough to the left of the green with his approach and chunking his third shot into a greenside bunker on the way to a double-bogey six.
Back to one-up, Campbell matched Woods with pars at the next three holes to stay in front with one to play.
After Campbell missed a birdie putt from 29 feet at the last, Woods had a chance to take the match into extra time but failed to sink his birdie attempt from 13 feet.
A frustrated Woods said: "I thought I did pretty good today. I didn't make a bogey and lost the match. I just didn't make anything on the greens.
Australia's Geoff Ogilvy eagled the 21st hole to outlast Canadian Mike Weir and American Zach Johnson beat Shingo Katayama of Japan 4&3.
- REUTERS
Golf: Woods no match for Campbell
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