American star Jordan Speith is odds-on to win The Open on Sunday.

The two-time major winner is three-shots clear of the field going into the final round, and is as short as 2/7 to seal the Claret Jug.

The win would Spieth create yet more history as he would become on the second player, after Jack Nicklaus to win three legs of the Golf Grand Slam before turning 24.

Victory would mean Spieth is only missing the PGA Championship, which he could claim later this year.

“I wouldn’t rather be in any other position than where we’re at,” said Spieth.

“And we have an opportunity to have a really special day on the golf course. I’m excited about it.”

Bookmakers are struggling to see any real competitors to Spieth, with second placed Matt Kuchar next best in the betting at 4/1 with next best being US Open champion Brooks Kopeka at 22/1.