Darren Clarke has been paired with Tiger Woods, and Lee Westwood with Vijay Singh for the first two rounds of the US Masters tomorrow and Friday.
Westwood, back in the event for the first time since 2002, does not have to wait too long, teeing off at 10.49am (3.49pm Irish-time). But Clarke and Woods are in the third-last group at 1.33pm (6.33pm) - just ahead of Ernie Els, David Toms and Adam Scott.
The third member of Westwood's group is American Chad Campbell, while Clarke and Woods are joined by Paraguay's Carlos Franco.
Padraig Harrington, Europe's leading player at sixth in the world rankings, is off at 9.27am (2.27pm) with Fuzzy Zoeller and Angel Cabrera, while Phil Mickelson begins his title defence with American amateur champion Ryan Moore and Australian Stuart Appleby. They go out at 10.38am (3.38pm).
Ulster's Graeme McDowell tees off at 12.22pm (5.22pm) with Ben Crenshaw and South Africa's Tim Clark.
David Howell's debut sees him in the very first group at 8.05am (1.05pm), with Ian Woosnam immediately behind.
British amateur champion Stuart Wilson, from Scotland, partners five-time British Open champion Tom Watson and former US Open champion Jim Furyk at 11.22am (4.22pm).
Organisers will have one eye on the weather, however, with thunderstorms having been forecast for tomorrow morning.
Mickelson, one of the tournament favourites, is expecting great things of Moore. "There have been some great amateur performances at Augusta, and I would not be surprised if Ryan Moore's was any less. It would not surprise me in the least, the type of player that Ryan is. I think he's exceptional."
Moore, who is still an amateur, swept the board last year with victories at the NCAA, US Amateur Public Links, Western Amateur, US Amateur and World Amateur events.
British Open champion Todd Hamilton will tee off at 8.49pm (1.49pm) with South African veteran and three-time winner Gary Player and US mid-amateur champion Austin Eaton III.
South Africa's Retief Goosen, the US Open champion, has an 9.49am (2.49pm) start with American Stewart Cink and Australian left-hander Nick O'Hern.
Two days before he goes looking for a fourth US Masters crown and ninth major title Woods said yesterday he believes his best is still to come.
Without a major since the 2002 US Open and displaced as world number one by Singh, Woods feels ready to start closing in again on Jack Nicklaus' record haul of 18.
"I'm only 29 - I'm not over the hill yet," he said with a big smile.
And when he was asked if he anticipated the best of his career was still ahead he answered: "I think so."
