England's Andrew Johnston gestures as he arrives at the 4th green during his final round on day four of the 2016 British Open Golf Championship at Royal Troon in Scotland on July 17, 2016. Troon has seen just about everything in terms of weather so far this week, with glorious sunshine on Thursday followed by wet and windy conditions on Friday and then more gusts on Saturday. Sunday is set to see a cloudy and damp start but the afternoon, when the leaders go out, is expected to remain dry and the wind is not forecast to blow any more strongly than on Saturday. / AFP PHOTO / Ben STANSALL / RESTRICTED TO EDITORIAL USEBEN STANSALL/AFP/Getty Images

US golfer Kevin Na plays from the 9th tee during his final round on day four of the 2016 British Open Golf Championship at Royal Troon in Scotland on July 17, 2016. Troon has seen just about everything in terms of weather so far this week, with glorious sunshine on Thursday followed by wet and windy conditions on Friday and then more gusts on Saturday. Sunday is set to see a cloudy and damp start but the afternoon, when the leaders go out, is expected to remain dry and the wind is not forecast to blow any more strongly than on Saturday. / AFP PHOTO / ANDY BUCHANAN / RESTRICTED TO EDITORIAL USEANDY BUCHANAN/AFP/Getty Images

Caddie Kenny Harns hands a ball to US golfer Kevin Na on the 6th tee during his final round on day four of the 2016 British Open Golf Championship at Royal Troon in Scotland on July 17, 2016. Troon has seen just about everything in terms of weather so far this week, with glorious sunshine on Thursday followed by wet and windy conditions on Friday and then more gusts on Saturday. Sunday is set to see a cloudy and damp start but the afternoon, when the leaders go out, is expected to remain dry and the wind is not forecast to blow any more strongly than on Saturday. / AFP PHOTO / GLYN KIRK / RESTRICTED TO EDITORIAL USEGLYN KIRK/AFP/Getty Images

US golfer Kevin Na watches his drive from the 6th tee during his final round on day four of the 2016 British Open Golf Championship at Royal Troon in Scotland on July 17, 2016. Troon has seen just about everything in terms of weather so far this week, with glorious sunshine on Thursday followed by wet and windy conditions on Friday and then more gusts on Saturday. Sunday is set to see a cloudy and damp start but the afternoon, when the leaders go out, is expected to remain dry and the wind is not forecast to blow any more strongly than on Saturday. / AFP PHOTO / GLYN KIRK / RESTRICTED TO EDITORIAL USEGLYN KIRK/AFP/Getty Images

Denmark's Soren Kjeldsen reacts after missing a putt on the 4th green during his final round on day four of the 2016 British Open Golf Championship at Royal Troon in Scotland on July 17, 2016. Troon has seen just about everything in terms of weather so far this week, with glorious sunshine on Thursday followed by wet and windy conditions on Friday and then more gusts on Saturday. Sunday is set to see a cloudy and damp start but the afternoon, when the leaders go out, is expected to remain dry and the wind is not forecast to blow any more strongly than on Saturday. / AFP PHOTO / Ben STANSALL / RESTRICTED TO EDITORIAL USEBEN STANSALL/AFP/Getty Images

US golfer Dustin Johnson holes his putt on the 8th green during his final round on day four of the 2016 British Open Golf Championship at Royal Troon in Scotland on July 17, 2016. Troon has seen just about everything in terms of weather so far this week, with glorious sunshine on Thursday followed by wet and windy conditions on Friday and then more gusts on Saturday. Sunday is set to see a cloudy and damp start but the afternoon, when the leaders go out, is expected to remain dry and the wind is not forecast to blow any more strongly than on Saturday. / AFP PHOTO / ANDY BUCHANAN / RESTRICTED TO EDITORIAL USEANDY BUCHANAN/AFP/Getty Images

US golfer Tony Finau chips onto the 4th green during his final round on day four of the 2016 British Open Golf Championship at Royal Troon in Scotland on July 17, 2016. Troon has seen just about everything in terms of weather so far this week, with glorious sunshine on Thursday followed by wet and windy conditions on Friday and then more gusts on Saturday. Sunday is set to see a cloudy and damp start but the afternoon, when the leaders go out, is expected to remain dry and the wind is not forecast to blow any more strongly than on Saturday. / AFP PHOTO / Ben STANSALL / RESTRICTED TO EDITORIAL USEBEN STANSALL/AFP/Getty Images

US golfer Tony Finau chips onto the 4th green during his final round on day four of the 2016 British Open Golf Championship at Royal Troon in Scotland on July 17, 2016. Troon has seen just about everything in terms of weather so far this week, with glorious sunshine on Thursday followed by wet and windy conditions on Friday and then more gusts on Saturday. Sunday is set to see a cloudy and damp start but the afternoon, when the leaders go out, is expected to remain dry and the wind is not forecast to blow any more strongly than on Saturday. / AFP PHOTO / Ben STANSALL / RESTRICTED TO EDITORIAL USEBEN STANSALL/AFP/Getty Images