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Tiger Woods of the United States acknowledges the crowd on the 18th green during the second round of the 144th Open Championship at The Old Course on July 18, 2015 in St Andrews, Scotland. (Photo by Streeter Lecka/Getty Images)

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Marc Leishman of Australia plays his approach shot on the second hole in the playoff during the final round of the 144th Open Championship at The Old Course on July 20, 2015 in St Andrews, Scotland. (Photo by Stuart Franklin/Getty Images)

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Adam Scott of Australia and caddie Steve Williams look along the 15th fairway during the final round of the 144th Open Championship at The Old Course on July 20, 2015 in St Andrews, Scotland. (Photo by Streeter Lecka/Getty Images)

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Jordan Spieth of the United States reacts to missing his birdie putt on the 18th hole during the final round of the 144th Open Championship at The Old Course on July 20, 2015 in St Andrews, Scotland. (Photo by Stuart Franklin/Getty Images)

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US golfer Jordan Spieth crosses the Swilcan Bridge on the 18th hole during his final round 69, on day five of the 2015 British Open Golf Championship on The Old Course at St Andrews in Scotland, on July 20, 2015. The weather-affected championship, finishes on Monday for only the second time in 155 years. (Photo by ADRIAN DENNIS/AFP/Getty Images)

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Jason Day of Australia reacts after missing his birdie putt on the 18th hole during the final round of the 144th Open Championship at The Old Course on July 20, 2015 in St Andrews, Scotland. (Photo by Stuart Franklin/Getty Images)

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Zach Johnson of the United States putts on the 18th green in the playoff as Louis Oosthuizen of South Africa looks on during the final round of the 144th Open Championship at The Old Course on July 20, 2015 in St Andrews, Scotland. (Photo by Matthew Lewis/Getty Images)

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Zach Johnson of the United States celebrates with caddie Damon Green after winning the 144th Open Championship at The Old Course during a 4-hole playoff on July 20, 2015 in St Andrews, Scotland. (Photo by Andrew Redington/Getty Images)

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The final scoreboard after the final round of the 144th Open Championship at The Old Course on July 20, 2015 in St Andrews, Scotland. (Photo by Matthew Lewis/Getty Images)

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Zach Johnson of the United States holds the Claret Jug after winning the 144th Open Championship at The Old Course during a 4-hole playoff on July 20, 2015 in St Andrews, Scotland. (Photo by Stuart Franklin/Getty Images)

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Zach Johnson of the United States kisses the Claret Jug after winning the 144th Open Championship at The Old Course during a 4-hole playoff on July 20, 2015 in St Andrews, Scotland. (Photo by Stuart Franklin/Getty Images)

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US golfer Zach Johnson holds the Claret Jug, the trophy for the Champion golfer of the year in front of the clubhouse as Johnson beat Australia's Marc Leishman and South Africa's Louis Oosthuizen in a four-hole playoff. (Photo by BEN STANSALL/AFP/Getty Images)

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The final scoreboard after the final round of the 144th Open Championship at The Old Course on July 20, 2015 in St Andrews, Scotland. (Photo by Matthew Lewis/Getty Images)

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Just not his Day

An Aussie crumbles at the last hurdle as an American reigns supreme at St. Andrews

Just not his Day

By Anthony Difederico Jul 21 2015 2:41PM

By Anthony Difederico

Jul 21 2015 2:41PM

An Aussie crumbles at the last hurdle as an American reigns supreme at St. Andrews

Australian Jason Day has had a final day to forget after letting the 2015 Open Championship slip through his fingers and into the hands of 39 year-old American Zach Johnson. Day who was leading the pack heading into the final day couldn't get the job done finishing in a tie for fourth with Irishman Pádraig Harrington.

Meanwhile, Johnson went onto claim his second major of his career after out-lasting Aussie Marc Leishman and South African Louis Oosthuizenin in a four-hole playoff after all three were tied on -15 after the final days play.

Fellow Australian Adam Scott finished in a tie for tenth.

Check out the best pictures from the 2015 Open Championships.