Dunne Follows Bobby Jones

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Paul Dunne shares the lead with 2010 winner Louis Oosthuizen and Australia’s Jason Day going into the final round of The Open Championship at St Andrews.

However, just one shot behind the leading trio, Jordan Spieth's bid for the third leg of an unprecedented calendar grand slam remained firmly on track after a breathless third round.

Masters Tournament and US Open champion Spieth could be denied a place in the record books by an equally remarkable performance after Dunne claimed a share of the lead.

Days after being mistaken for Spieth by fans seeking autographs due to their identical clothing, Dunne carded a flawless 66 on the Old Course to finish 12 under par alongside playing partner Oosthuizen - whose win in 2010 came last time The Open was staged at St Andrews - and perennial Major contender Day.

Spieth also shot 66, with 2007 and 2008 champion Padraig Harrington a shot further back on ten under after a superb 65.

Nine players were tied for sixth on nine under, including another amateur in American Jordan Niebrugge, Justin Rose, Sergio Garcia and Adam Scott, along with England's Danny Willett, who led outright after ten holes but drove out of bounds on the 14th.

Dunne is the first amateur since the legendary Bobby Jones to lead The Open after 54 holes, the American going on to lift the Claret Jug at St Andrews in 1927.

Three years later, Jones became the last amateur winner of The Open to date at Royal Liverpool and went on to complete the "Impregnable Quadrilateral" of Amateur Championship, Open Championship, US Open and US Amateur titles.

Paul Dunne Factoids

Started golf when he was 10 and began playing "properly" from age of 12.

Now 22, he booked his place at the Open through final qualifying at Woburn, finishing ahead of the likes of Retief Goosen and Colin Montgomerie, having done exactly the same 12 months earlier to secure his debut in the event at Royal Liverpool. However, he almost missed his tee time for qualifying this year after not allowing enough time for the shuttle bus to get him to the 10th tee.

Won the 2010 Irish Youths Amateur Championship title, following in the footsteps of Open champions Padraig Harrington and Louis Oosthuizen, who won his Claret Jug at St Andrews.

Aiming to become the first amateur to win the Open since Bobby Jones in 1930. He is also in line to become the first Irishman to win the silver medal, awarded to the leading amateur making the cut, since a certain Rory McIlroy at Carnoustie in 2007.

Graduated from the University of Alabama in business finance in April. Fellow Irishman Alan Murray coached him at university and is caddying for him this week.

Plans to turn professional later in the year after the Walker Cup, which he is trying to qualify for having been included in a provisional 20-man squad.

Wears same apparel as two-time major winner Jordan Spieth, whom he leads by one stroke, and has been mistaken for the calendar year Grand Slam-chasing American more than once this week.