Georgia :Australian Geoff Ogilvy opened with a career-best 64 on Thursday at the Buick Challenge, tying 2000 Masters champion Vijay Singh for the lead at Callaway Gardens in Georgia, USA - an idyllic setting for The Buick Challenge. Ogilvy's performance included 8 birdies and sits atop the leader board after the first round. Mike Sposa is tied with Joel Edwards, Neal Lancaster, Per-Ulrik Johansson and Danny Ellis at 65, one stroke behind the leaders. David Duval shot a 67 and is among a group of 8 tied at three strokes off the lead. Vijay Singh knocked in a 6-metre birdie from the fringe of the green at number 14, then just missed a hole-in-one on 16 for another birdie. Madrid Open In the first round of the Madrid Open in Club de Campo, South African Retief Goosen made a solid start, holing five birdies on the way to a five- under-par round of 66. Reigning champion Padraig Harrington reached the turn in 32 with three birdies, an eagle at the seventh and a single bogey. Harrington was just as prolific on the greens over the back nine, sinking another five birdies on the way to an eight-under-par opening round of 63. He was the outright leader and looks capable of picking up his first win of the season. He holds a one shot lead over Stephen Gallacher, who moved up to second place on the leader board with three birdies over the last five holes for a round of 64. Miguel Angel Jimenez started at the tenth and sunk three birdies over the next eight holes, only to drop a shot at the 18th. But the Spaniard then birdied the next two, at the first and the second, to move in to contention. Darren Clarke made a good start to the weekend with a four-under-par round of 67. Jose Maria Olazabal sits six shots off the lead after a first round of 69. Tony Johnstone chipped in from a bunker for a birdie at the sixth, but he failed to show any glimpse of that skill over the rest of his round and finished the day at one over. Jimenez continued his climb up the leader board with further birdies at the fourth and seventh for a round of 65, which was enough for a share of third place.