A frustrated Tiger Woods ended the opening round of the Deutsche Bank Championship nine strokes off the pace after making a stumbling start.

The world number one and defending champion bogeyed the second and ran up a double-bogey six at the fourth, after taking three shots to escape a greenside bunker, on his way to a one-over-par 72, the same score as Open champion Padraig Harrington.
   
"I did not get off to a good start and it was a bit of a grind out there," Woods told reporters after parring the last 11 holes to finish well behind pacesetting Colombian Camilo Villegas.
   
"I didn't make any putts for birdie and collectively I think we all felt like we left some shots out there," he added, referring to his high-profile playing partners Phil Mickelson and Vijay Singh.
   
World number three Mickelson opened with a 70 at the TPC Boston while Singh, the 2004 champion, battled to a 74.
   
"Hopefully we can clean it up tomorrow," said Woods, who is back in PGA Tour action after a two-week break. "Phil got off to a great start, just had one bad hole, but otherwise played well all day. Vijay kind of struggled all day.
   
"I hit good putts, except for the one on nine which I pulled. That was a bad putt. The rest of them were actually good putts. But it is what it is, they just didn't go in."
   
Woods, who won last year's Deutsche Bank Championship by two strokes, knows he faces an uphill task if he is to claim his sixth Tour title of the season.
   
"I'm just trying to get back under par," the 31-year-old American said. "I saw the lead get to eight. I thought if I could just get under par, shoot two good rounds the next two days and at least give myself a chance going into Monday.

"But I didn't get to under par so now I've got to shoot at least one great round in there and at least get myself back in the ball game."
   
Woods felt he was unfortunate to drop two shots at the 298-yard par-four fourth hole.
   
"I was just trying to hit the ball right and I pulled it about five yards left of the flag," he said of his tee shot. "I ended up in the bunker, the only place you can't be."
   
His second shot there ended up right under the lip of the bunker and his third came back into the sand before he finally reached the green with his fourth.
   
"I wasn't even trying to get cute with it," he said of his first attempt to escape the bunker. "I tried to hit it long over the green and pitch it back up. It just came out soft and buried under the lip.
   
"Even though I was three over after four, I didn't really hit a bad shot. Somehow I made a mistake and it cost me two shots, if not three.
   
"So you keep going. It's not like I haven't been in this position before. I kept saying I have basically 68 holes to make it up, let's go get it."