American Jordan Spieth insists he believes he is ‘going under the radar’ as he prepares for his second attempt at a career Grand Slam at the US PGA Championship this week.

The 25-year-old is hoping to become just the sixth golfer to win all four majors when he plays at Bellerive Country Club in St Louis this weekend. Spieth could have become the youngest player to achieve the feat last year but he finished 28th and Tiger Woods still holds the record.

The three-time major winner went into last year’s event on the back of a win at The Open at Royal Birkdale but he insists his disappointing recent form can help him avoid some extra pressure. He told BBC Sport:

“I was probably a little more anxious last year. “Going in there was a big focus on it, given it was right after winning the Open Championship, so it was fresh, I was in form and going to a place that – if I worked up the leaderboard – it would create a lot of noise. “I feel somewhat under the radar this year. I’ve kind of felt that way a lot this year – I don’t mind it.”

Gene Sarazen, Ben Hogan, Gary Player, Jack Nicklaus and Woods are the five players to have won all four majors and Spieth is 21.00 to lift the trophy this week.

The current favourite remains Dustin Johnson at 9.00, while Justin Thomas is 15.00 after his win at the WGC-Bridgestone Invitational last week.