Woods had four birdies in an up-and-down round at Whistling Straits
Tiger Woods gave an indication he was ready to resume his quest for major titles with a competitive first round at the USPGA Championship in Wisconsin.
The world number one, joint 78th out of 80 at last week's WGC-Bridgestone Invitational, was three under after only four holes at Whistling Straits.
He had to settle for a one-under round of 71 but was pleased with his efforts.
"I felt like I had control of the ball for most of the day, especially my trajectory," he said afterwards.
"I got off to a quick start and all of a sudden I felt like I could shoot something in the 60s, but it didn't quite happen."
Woods, needing a top-15 finish to have a chance of qualifying automatically for the Ryder Cup, took a share of the lead when a hot putting streak gave him birdies at three of the first four holes.
But an errant tee shot led to the first of three bogeys on the 518-yard par-four 15th, his sixth hole, and there were further dropped shots at the second and seventh.
Woods ended on a positive note, however, with a fine approach and a six-foot birdie putt on the ninth.
He added: "I've just got to continue to improve every day, I just need to solidify.
"I felt I had good speed on the greens, if anything I was a bit slow with the putts. The greens were a bit slower than they looked.
"I played too good not to shoot under par. It would have been very disappointing and frustrating to end up at even par with as well as I played today."