MARANA, Ariz. (AP) — One day after Tiger Woods felt as though nothing had changed, something did.

He was losing.

Woods' streak of 82 consecutive holes without trailing in the Accenture Match Play Championship ended in the second round against Tim Clark of South Africa, who built a 2-up lead with six holes to play Thursday.

Competing for the first time since reconstructive knee surgery eight months ago, Woods didn't look much different than he did when he easily beat Brendan Jones in the opening round. But he ran into a pesky opponent with a sweet touch around the greens and good line on a 70-foot birdie early in the match.

Phil Mickelson, meanwhile, survived a meltdown for the second straight round, outlasting fellow Masters champion Zach Johnson, 1 up.

And this World Golf Championship suddenly had an English flavor after big victories from Oliver Wilson, Ross Fisher and Paul Casey, with two other Englishmen tied in their matches.

Geoff Ogilvy rallied to beat Shingo Katayama, going 19 holes for the second straight day.

Clark was on the back end of the fifth green, two tiers above the hole, when he jokingly asked Woods to move his marker one spot over. Moments later, however, Clark asked him to tamp down his coin. His putt rolled right over Woods' mark, down the final ridge and broke left toward the cup. The South African raised his arm and pointed his index finger as the birdie putt made its final turn.

That squared the match, and Woods fell behind on the next hole.

Clark hit a 6-iron that bounced hard off the green on the par-3 sixth. Woods took notice, and sent his tee shot as high into the air as possible. But he paid a price when it came up short — it plugged into the bunker and Woods had no chance to get it closer than 15 feet.

Behind the green, Clark's chip barely reached the ridge and trickled down to 3 feet.

He won the hole with a par to go 1 up. It was the first time Woods, the defending champion, had trailed in this tournament when K.J. Choi had a 1-up lead after one hole of their quarterfinal match last year.

Woods quickly tied the match with a 10-foot birdie on the seventh, and they were all square making the turn.

But on the par-5 11th, Woods hit into the bunker off the tee, had to lay up and was short of the green on his third shot. Clark won the hole with a 4-foot birdie putt, then went 2-up with an 8-foot birdie on the 12th.

Mickelson is getting used to these comebacks.

He blew a four-shot lead and came back to win at Riviera on Sunday. Then he lost a 4-up lead in the first round against Angel Cabrera, finally beating him in 19 holes. Lefty nearly did it again against Johnson.

Mickelson bogeyed the 14th, and Johnson made birdie on two of the next three holes to send the match to the 18th. Johnson missed a 35-foot birdie on the 18th to lose.

"I was able to heart it out there at the end," Mickelson said.

Wilson, still looking for his first professional win, played the best golf of the tournament with eight birdies in 17 holes to beat Anthony Kim, 2 and 1. It was typical of this fickle format; Kim was 4 under when he lost, a round that would have been good enough to win other matches.