Jordan Spieth says he is treating the season-ending Tour Championship in Atlanta like a major championship as he homes in on victory at East Lake and the FedEx Cup title that would accompany it.

Spieth has pocketed two majors this year and finished no worse than fourth in the remaining two and he insists he is trying to recreate the intense focus of golf’s prime events this week.

“I’m very motivated,” Spieth said. “It’s something I want badly, and it’s going to feel a lot like a major championship when I step on the first tee.”

Spieth has been matching his performances at the majors this year so far in Atlanta, making just one bogey in 54 holes through three rounds.

That was enough to see him overhaul long-time leader Henrik Stenson with a closing birdie on the 18th green in his third round.

Played in atrocious conditions, the 22-year-old Texan shot a 68 to record a four-shot swing on Stenson who fell to a two-over par round of 72.

The pair go into the final round with a healthy advantage over the chasing pack. Spieth leads the way on eight-under par, one clear of Stenson with Rickie Fowler and England’s Paul Casey on four-under and Rory McIlroy a shot further back on -3.

Spieth is determined to cap what he says he has been a ‘dream come true’ season with victory at East Lake.

“I’ll work hard for the win because I want to win this golf tournament. It would be special to get your name on that trophy,” he added. “There are some pretty nice names early on that FedEx Cup trophy.”

Spieth will be in Presidents Cup action next month in North Korea where the USA are 1.53 to defeat the Rest of the World team, available at 3.20.