Commentator Peter Alliss believes Tiger Woods should only return to competitive action if he can test the best.

The former world number one is taking an indefinite break from golf as he bids to overcome his latest injury scare and poor form.

"I'm sure like many others I don't understand it, but I hope it's not the end for him," said Alliss. "I hope he doesn't go out on a whimper. I think he might come back again, but it might be romantic to say he'll win a couple of majors.

"I'd like him to finish and play well - I don't want him to remember him hitting 82 and walking off courses in a wounded state."

Woods withdrew midway through his first round at last week's Farmers Insurance Open in California due to back pain, although he insisted Wednesday's announcement he was taking an indefinite break from the game had nothing to do with injury.

Paul Azinger believes the 14-time major champion needs to stop over-thinking his swing.

''I'd like to see Tiger kick the video camera to the kerb,'' Azinger, the 2008 US Ryder Cup captain, told USA TODAY. ''What Tiger has done is sacrifice a winning swing at the altar for a quest for the perfect swing. And a perfect swing doesn't exist.

''Feel is the key here. A great player has to eliminate one side of the course and he's fighting a two-way miss. He has to feel he won't hook the ball instead of thinking how not to hook the ball.''

Meanwhile Miguel Angel Jimenez leads the inaugural True Thailand Classic by a shot after Friday's second round.

The veteran Spaniard, who was struggling with illness, carded a six-under-par 66 to go with his 67 on Thursday, leaving him a stroke ahead of Thailand's Kiradech Aphibarnrat.

He signed for a 67 to move into the thick of the contention, but remains in the shadow of Jimenez overall, and it would have been a bigger deficit were it not for the European's last-hole bogey.

"I'm very happy. I am disappointed to make bogey on the last but overall I played very solid and made a lot of birdies. You're always happy when you're under par - and the more under par you are, the happier you are," said Jimenez on the tournament's official website.

"I have a heavy cold and I'm very bunged up and slept terribly last night, but apart from that I'm fine."