Adam Scott and Vijay Singh set for final-round showdown Adam Scott has taken control on Day three. 5.30pm: Adam Scott has told an expanded chasing pack to "catch me if you can" with another five-under 66 that has left this week's main attraction with a four-shot lead heading into Sunday. He will be joined by former world No.1 and three-time major winner Vijay Singh in the final group on day four after the 50-year-old legend came from nowhere to set up the high-interest duel with a tournament-best round of eight-under 63. Vijay Singh has charged up the leader board. Scott will start the final round at 14-under and hoping to use the sizeable buffer he has on four other players on 10-under - Vijay Singh, South Australian Nick Cullen and Victorians Nathan Holman and Matthew Griffen - to defend his yellow jacket. The world No.2 jumped out to a four-shot advantage with three straight birdies on the seventh, eighth and ninth, but then got the shakes with back-to-back bogeys on the par four 11th and 12th. He finished off with typical class to birdie the 15th and 17th. One shot further back from the group at equal second, but still in contention should he go super low is AmericanMatt Kuchar, who piled up another six birdies to fire a four-under 67 and finish at nine-under. Maximillian Kieffer, of Germany, finds himself in an awkward spot. 4.25pm: Just when it looked as if Adam Scott was going to be the only man who could beat Adam Scott, that's exactly what has started to happened. As the world No.2 exploded out to a four-shot lead turning into the back nine, his rock-solid game suddenly got the wobbles, with Scott recording back-to-back bogeys at the par-four 11th and 12th to cut his lead to just two shots. It was just the second and third bogeys this week for a player who had until that point seemed in total control of every club in his bag. Adam Scott shows his disappointment at missed putt. However if Scott has had one issue on the tricky Royal Melbourne course, it has been judging the pace - rather than the line - of putts and that is what brought him unstuck, leaving long birdie chances on both holes short and then just missing the mop-up attempts. Now at 12-under, it appears the biggest threat to the defending champion is not coming from his playing partner, equal overnight leader Nathan Holman, but former world No.1 Vijay Singh. The three-time Major winner has just signed in the best round of the tournament, an eight-under 63, to join Holman at 10-under and potentially set up a fascinating Sunday battle with Scott. 3.35pm: Adam Scott has made his first major power play of the third round, putting a four-shot buffer between himself and young playing partner Nathan Holman in the blink on an eye. The current green jacket holder has put it on the inexperienced Holman to respond, nonchalantly reeling off birdies on the seventh, eighth and ninth to race clear at 14-under heading into the back nine. Scott rolled in a curving six-metre putt on the par-four eighth to put the heat on the 22-year-old and then threatened to leave Holman in his wake with another long-range attempt that lipped in on the par-four ninth. Geoff Ogilvy lines up a putt. Photo: Graham Denholm After a bright start where the Victorian burst out to his own two-shot lead, Holman has showed signs of cracking, added another bogey on the par-four seventh to his earlier blemish on the par-three fifth to fall back to 10-under through the front nine. American Matt Kuchar, currently third at eight-under, continues to push hard to set up a marquee Sunday pairing with Scott, but the world No.8 still needs to pick up at least two shots in his final seven holes to match or overtake Holman for that position. 3pm: The real stuff has begun, with the final group duel between "the Master" and his apprentice under way. Defending champion Adam Scott and joint leader Victorian Nathan Holman remain locked in the lead having both started the third round two-under through six holes. The 22-year-old has shown no signs of nerves playing with one of golf's superstars, in fact it was Holman who took it up to Scott in the early going, grabbing the lead for a brief period with birdies on the first, third and fourth. However a bogey on the par three fifth allowed Scott to catch the momentum swing when he birdied the same hole. Meanwhile, former world No.1 Vijay Singh has finally made a run at the leaders, shooting out to four-under after 10 holes to be six-under for the tournament. On a day when low scores are filtering in from all over the course, American drawcard Matt Kuchar has been the other big mover, jumping up to equal third at eight-under with a round of three-under through the front nine. As usual, there was no shortage of twists and turns for inspirational Victorian Jarrod Lyle, who finished a promising round with two bogeys to sign in a one-under 70 and get to even with the card. Playing partner and former US Open champion Geoff Ogilvy produced his best round of the tournament, a four-under 67, to move up to three-under heading into day four.