Chopra holed the back nine in just 30 strokes to take the lead

R2 LEADERBOARD:
-10 D Chopra (Swe)
-8 V Singh (Fij)
-7 T Immelman (SA), S Cink (US), J Ogilvie (US)

Swede Daniel Chopra edged closer to his first win on the US Tour as he moved into a two-stroke lead at the PGA Western Open in Illinois.

Chopra sunk seven birdies to card a second straight 66 and top the leaderboard on 10 under ahead of world number three Vijay Singh.

Tiger Woods got himself out of trouble at Cog Hill as he birdied four of his first six holes to move to three under.

England's Luke Donald, playing with Woods, also fared better with a 67.

The 28-year-old, who is chasing a Ryder Cup spot on the European team, moved to five under after a mixed round of seven birdies and three bogeys.

I'm pleased with the way I was able to make the changes Tiger Woods

Stewart Cink had one of the best rounds of the day, holing nine birdies for a 64, to take a share of third alongside Joe Ogilvie and Trevor Immelman.

Phil Mickelson had been one off the lead after the opening round but slid out of contention with a three-over-par 74.

The American bogeyed four of his first five holes to finish on one under - good enough to make the cut.

"Things kind of didn't go my way at all," said Mickelson. "I got off to a poor start bogeying those four holes in a row.

"I just didn't play the way I wanted to but we've got two more rounds."

Woods was much happier that his time spent on the practice range after the first round paid off.

"I'm pleased with the way I was able to make the changes from yesterday to today and adapt," said Woods.

"Hopefully I will get it turned around for the next day."