England's Lee Westwood built a commanding five-shot advantage after three rounds of the Indonesian Masters.
He could regain his world number one spot if he wins and Luke Donald does not win The Heritage in South Carolina.
After Friday's lightning threats, Westwood had to finish two holes of his second round, making a birdie at the 18th to complete a round of 66.
He added eight birdies in a third-round 66 to reach 16 under, with Park Hyun-bin and Thitiphun Chuayprakong second.
Following his blistering start to the second round with four successive birdies, Westwood started round three in similar fashion, with birdies at the opening three holes before dropping a shot at the par-three fourth.
He soon compiled another three consecutive birdies but dropped a shot at the last.
Despite that bogey at the par-five, which he had birdied in the two previous rounds, Westwood was in confident mood and was full of praise for the Royale Jakarta lay-out.
"This course is one of the best in Asia and the greens were great after last night's rain," he said. "I like the golf course. It seems to be setting up nicely for me and I've been hitting it well. My iron play has been accurate and you can only have accurate iron play when you hit a lot of fairways.
"I hit the ball really well and made some good putts. It was a shame to bogey the last and every time you drop a shot on the last you feel disappointed but a 66 is a good score."
Westwood is also delighted with his conventional putter having switched from a belly putter after the first round.
"It feels much better because every decent putt seems to go in and that made me more comfortable," he said. "I've been in this position before and I'll try not to get ahead of myself."