World number two Jordan Spieth is looking forward at a "20 to 25-year" rivalry with Rory McIlroy.
American Spieth would become the youngest player to complete a career grand slam with victory at this weekend's US PGA Championship, which will be shown live in Ireland on eir sport.
The 24-year-old, who won the Open at Royal Birkdale at the end of July, will join Gene Sarazen, Ben Hogan, Gary Player, Jack Nicklaus and Tiger Woods as winners of all four majors with victory at Quail Hollow.
McIlroy, 28, won the US Open in 2011, the PGA Championship in 2012, and in 2014 claimed both the Open and PGA Championship titles, and needs to win the Masters at Augusta to complete his own grand slam.
Spieth expects his main challenger in North Carolina to be world number four Mcilroy, who has won two PGA Tour events at the Charlotte course and holds the course record 61 from his 2015 Wells Fargo Championship victory.
And the Texan say the competition from McIlroy inspires the pair of them to play their best golf.
"If you're matched up on Sunday, and you get to choose somebody, you obviously want to be able to play against somebody like Rory who has four major championships and is one of the top couple most accomplished players in this field," he said.
"But he is one to fear in that position because of what he's capable of doing and how he's going to do it.
"I think it's cool that we've both had the success that we've had at such a young age, and I think the coolest part about it is the question of what's it going to be like for the next 20, 25 years.
"We're friendly with each other and really want each other to do well because it does push each other to get better."
McIlroy begins his bid for a third US PGA title at 6.35pm Irish time alongside Jon Rahm and Rickie Fowler.
eir Sport will show all four days of the PGA Championship from Quail Hollow, 10-13 August. Coverage begins at 6pm Irish time on eir Sport 1 on Thursday, 10 August.
Photo Getty Images/ Sam Greenwood
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