Jack Nicklaus believes the final major of the year is wide open, but recent evidence suggests it will be one of golf's star names who wins the US PGA Championship at Oak Hill.
Since Darren Clarke and Keegan Bradley won the last two majors of 2011 when ranked 111th and 108th in the world respectively, the lowest ranked winner of a major has been Ernie Els, who was 40th when he won the Open at Lytham.
And in 2013, all three major champions have come from inside the world's top 10, with Adam Scott (seventh) winning the Masters, Justin Rose (fifth) claiming the US Open and Phil Mickelson also fifth before his Open triumph at Muirfield.
That bodes well for the likes of world number one Tiger Woods and defending champion Rory McIlroy, whose eight-shot victory at Kiawah Island last year surpassed the previous biggest winning margin in the event, Nicklaus winning by seven shots at Oak Hill in 1980.
Nicklaus, who finished six under par and was the only man in red figures as he won his fifth and final US PGA title, said: "The player has to suit his game to the golf course and the guys that can adapt to it are the guys that always have been the good players.
"I mean, Mickelson will adapt well to it. Tiger will adapt well to it. I think there's a lot of guys that will adapt well to it. You have so many good players today that I think will like Oak Hill, will enjoy playing the golf course and could have an opportunity to win. To try to pick one of them out of there is pretty difficult right now.
"The British Open, you can eliminate a lot of guys because of conditions. The US Open you have the same thing and the Masters the same thing. But I think more people, because of the summer conditions and the nature of what happened with the PGA Championship, it opens it up to more people having an opportunity to win. So I think the PGA is a pretty open ball game right now."
Woods goes into the event on the back of his eighth victory in the WGC Bridgestone Invitational, the 14-time major winner shooting a second round of 61 on his way to a seven-shot win.
The 37-year-old has now won five times on the PGA Tour this season, but his last major title remains the 2008 US Open and he is still four short of equalling Nicklaus' record tally of 18.
"Obviously Tiger has had a very, very good year," Nicklaus added.
"He's not finished off a couple majors he's had an opportunity to be involved in (but) you would be pretty hard pressed not to make him, if not the favourite, one of the favourites going into Oak Hill."