|144th Open Championship|
|Venue: St Andrews Dates: 16-19 July|
|Coverage: Live across BBC TV, Red Button, Connected TVs, online, Radio 5 live, sports extra, tablets, mobiles and app.|
Tyrrell Hatton was an overwhelmed 18-year-old amateur when he made his Open debut at St Andrews in 2010.
He shot rounds of 78 and 77 to miss the cut by nine shots on 11 over par.
But the Englishman returns this week as a fully-fledged European Tour professional, who is lurking just outside the world's top 100.
"If you'd said to me five years ago that I'd be back here playing in my fourth Open, I'd have been over the moon with that," Hatton told BBC Sport.
"When I was 18, it was quite daunting being on the range next to these guys. Now I'm pretty used to it.
|Open role reversal for Hatton|
|Tyrrell Hatton, now ranked 114 in the world, will be in the company of a young English amateur making his Open debut when he tees off on Thursday morning at 10:50 BST. He has been paired with 21-year-old Liverpudlian Paul Kinnear, as well as Australian Scott Arnold.|
|As an amateur, Marlow-based Hatton, who represents Harleyford Golf Club, played in the same Bucks, Berks and Oxfordshire side as Eddie Pepperell, who is also making his Open debut this week at St Andrews.|
"Sadly, my three previous attempts at playing in an Open have not turned out too good," added the Buckinghamshire professional, who also missed the cut at Muirfield in 2013 and at Hoylake a year ago. "But I'm playing well now. And I'm happy that I can hold my own when pressure is on.
"I've had some good finishes in the last year and hopefully my first win is not too far away."
After finishing with his best round of the week at the Scottish Open on Sunday, a four-under 66 at Gullane, Hatton admitted: "I tweaked something in my set-up and hit the ball a lot better. It was good preparation for next week.
"I played at St Andrews in the Dunhill Cup last year and it's a different atmosphere to anywhere else. I remember seeing Jack Nicklaus holing that putt on the final green when he played his final Open 10 years ago. You can't match that sort of occasion anywhere in the world."