Southport - Jordan Spieth won the British Open at Royal Birkdale on Sunday by three shots from fellow American Matt Kuchar.
Spieth, 23, shot a final round of 69 to finish on 12 under par, with Kuchar second at nine-under. He is the first man to post four rounds in the 60s in an Open at Birkdale.
It is Spieth's third major title after he won the Masters and US Open in 2015.
Spieth had been top of the leaderboard after each of the first three rounds and his victory saw him emulate the great Jack Nicklaus in getting his hands on a third different major before turning 24.
He had started the day three shots ahead of Kuchar but he very nearly threw it away, bogeying three of the first four holes as he went out in 37, three-over.
Spieth and Kuchar were level at eight-under standing on the 13th tee, when the former's wild tee shot forced him to take a drop and play his approach to the green from an adjacent practice ground.
He escaped with a bogey to trail by just one shot going onto the 14th, before recovering his nerve to pick up three birdies and an eagle in his next four holes to secure the Claret Jug in astonishing fashion.
Kuchar had four birdies but also three bogeys, including at the 18th, as he finished with a one-under 69 and missed out on what would have been a first major of his career at the age of 39.
China's Li Haotong came from nowhere to finish third on six-under after a stunning seven-under-par last round of 63.
Rory McIlroy, the 2014 champion, finished with a 67 to share fourth on five-under with Spain's Rafael Cabrera-Bello.
Scores from the final round of the 146th British Open at Royal Birkdale on Sunday (par 70; GBR/IRL unless stated; a-denotes amateur):
268 - Jordan Spieth (USA) 65-69-65-69
271 - Matt Kuchar (USA) 65-71-66-69
274 - Li Haotong (CHN) 69-73-69-63
275 - Rory McIlroy 71-68-69-67, Rafael Cabrera-Bello (ESP) 67-73-67-68
276 - Brooks Koepka (USA) 65-72-68-71, Alex Noren (SWE) 68-72-69-67, Marc Leishman (AUS) 69-76-66-65, Branden Grace (RSA) 70-74-62-70, Matthew Southgate 72-72-67-65
277 - Chan Kim (USA) 72-68-67-70, Paul Casey 66-77-67-67, Henrik Stenson (SWE) 69-73-65-70
278 - Hideki Matsuyama (JPN) 68-72-66-72, Chris Wood 71-72-68-67, Jason Dufner (USA) 73-71-66-68, Zach Johnson (USA) 75-66-71-66, Ian Poulter 67-70-71-70, Austin Connelly (CAN) 67-72-66-73
279 - Charley Hoffman (USA) 67-73-72-67, Xander Schauffele (USA) 69-75-70-65
280 - Richard Bland 67-72-70-71, Richie Ramsay 68-70-70-72, Adam Scott (AUS) 69-74-70-67, Rickie Fowler (USA) 71-71-67-71, Jamie Lovemark (USA) 71-69-70-70
281 - Jason Day (Aus) 69-76-65-71, Andrew Johnston 69-74-67-71, Bubba Watson (USA) 68-72-71-70, Thongchai Jaidee (THA) 70-73-68-70, Tony Finau (USA) 70-73-67-71, Aaron Baddeley (AUS) 69-76-72-64, Daniel Berger (USA) 68-76-70-67, David Drysdale 72-73-66-70, Tommy Fleetwood 76-69-66-70, Lee Westwood 71-74-69-67
282 - Steve Stricker (USA) 70-72-69-71, Soren Kjeldsen (DEN) 71-71-72-68, Laurie Canter 70-72-72-68, Sergio Garcia (ESP) 73-69-68-72, Russell Henley (USA) 70-70-75-67, Martin Kaymer (GER) 72-72-70-68, Webb Simpson (USA) 71-74-70-67
283 - Ross Fisher 70-72-66-75, Joost Luiten (NED) 68-72-70-73, Andrew Dodt (AUS) 69-75-69-70, Kevin Na (USA) 68-75-68-72, Kang Sung-Hoon (KOR) 68-73-76-66, Peter Uihlein (USA) 72-72-69-70, Chang Yi-Keun (KOR) 71-71-71-70, Jon Rahm (ESP) 69-74-70-70, Matthew Fitzpatrick 69-73-68-73, Thomas Pieters (BEL) 69-75-68-71
284 - Dustin Johnson (USA) 71-72-64-77, Scott Hend (AUS) 71-74-65-74, J.B. Holmes (USA) 71-72-71-70, Justin Rose 71-74-69-70, Toby Tree 70-75-69-70, Jimmy Walker (USA) 72-72-70-70, Kevin Kisner (USA) 70-71-74-69
285 - Ernie Els (RSA) 68-73-70-74
286 - Mike Lorenzo-Vera (FRA) 75-70-70-71, K.T. Kim (KOR) 73-71-69-73, Charl Schwartzel (RSA) 66-78-71-71, Shaun Norris (RSA) 71-74-65-76, Sean O'Hair (USA) 72-73-71-70, Thorbjorn Olesen (DEN) 70-72-74-70, Song Young-Han (KOR) 71-74-69-72, a-Alfie Plant 71-73-69-73
287 - Andy Sullivan 70-75-69-73, Brandon Stone (RSA) 73-72-68-74, Gary Woodland (USA) 70-69-74-74, Joseph Dean 72-72-70-73
288 - James Hahn (USA) 68-76-70-74, Bernd Wiesberger (AUT) 69-75-71-73
289 - Danny Willett 71-74-73-71
290 - Kent Bulle (USA) 68-72-74-76