Westwood has been a key member of Europe's team for six Ryder Cups
Europe captain Colin Montgomerie is certain Lee Westwood will be fit to play in the Ryder Cup in October.
The world number three is recovering from a calf injury that forced him to pull out of the USPGA Championship.
Montgomerie said the 37-year-old was unlikely to play before the Ryder Cup at Celtic Manor but was ahead of schedule in his recovery.
"You can damn well guarantee that Lee Westwood will be playing at Celtic Manor," said the Scot.
Englishman Westwood has been enjoying one of the best seasons of his career, finishing second in the Masters and the Open and closing in on Tiger Woods and Phil Mickelson at the top of the world rankings.
He ruptured the plantaris muscle in his right calf at the French Open in early July and, although he played through the pain at St Andrews, he pulled out of the WGC-Bridgestone Invitational tournament in America earlier this month after two rounds because he was finding it hard to put weight on his right leg.
"I phoned Lee on Sunday," added Montgomerie. "Whether he will be playing any competitive golf before the Ryder Cup is in doubt but at the same time he'll be hitting balls a week ahead of his scheduled time, which is two weeks before the Ryder Cup.
"That gives me great heart and should give us all great heart."
Westwood has played in the last six Ryder Cups, winning 14 matches, losing 10 and halving five.
He leads Europe's points table for this year's event, with the top nine after the Johnnie Walker Championship on Sunday qualifying along with three wildcards, to be chosen by Montgomerie.
Europe are seeking to regain the Ryder Cup after they lost to the United States by 16½ points to 11½ in Kentucky in 2008.