Online bookmakers are offering free bets on the WGC Bridgestone Invitational at Firestone Country Club, Akron, Ohio from 5-8 August.
Organisers have put together some fascinating pairings for the first round of this World Golf Championship event which will get under way at 1.30pm BST on Thursday.
Pick of the two balls is Tiger Woods and Lee Westwood who step up at 6.50pm with Westwood threatening to oust Woods as world number one.
Online bookmaker bwin offer odds of 11/12 for Woods to shoot the lower first round score while Ladbrokes go 11/8 for Westwood to win the first round match.
At the same time, Ryder Cup hopefuls Paul Casey and Justin Rose tee off from the tenth with Bet365 going 21/20 for Casey and Stan James going 23/20 in the match betting.
World number two Phil Mickleson tees off with rising star of golf, Ulsterman Rory McIlroy at 2.50pm.
Bet365 make Big Phil 5/6 favourite for the match and Stan James are offering 11/8 McIlroy.
Ernie Els and Steve Stricker are first and second in the money list and they tee off against each other at 2.40pm; Totesport are 5/4 Els and Boylesports go evens Stricker for this match up.
Selected tee times in BST, * denotes pairings starting on back nine:
14:40 Ross Fisher, Ian Poulter - *Steve Stricker, Ernie Els
14:50 Henrik Stenson, Robert Allenby - *Phil Mickleson, Rory McIlroy
13:00 Sean Ohair, Edoardo Molinari – *Anthony Kim, Louis Oosthuizen
18:00 Jeff Overton, Ryo Ishikawa – *Bo VanPelt, Martin Laird
18:10 Rickie Fowler, Adam Scott – *Alvaro Quiros, Ben Crane
18:40 Luke Donald, Jim Furyk – *Martin Kaymer, Tim Clark
18:50 Tiger Woods, Lee Westwood - Paul Casey, Justin Rose
19:00 Retief Goosen, Zach Johnson – *Padraig Harrington, Graeme McDowell