Brazil's 19-year-old Angela Park stayed on track for a breakthrough first professional victory with a third round 68 as world No.1 Lorena Ochoa saw her challenge fade at the Evian Masters on Saturday. Park, last year's LPGA Tour Rookie of the Year, showed her growing maturity as she birdied the final three holes for a 14-under-par 202 total and a one stroke lead over Taiwan's Candie Kung, who had a joint best of day 67. Helen Alfredsson, the popular 43-year-old Swede, was in second place at halfway, but she had a roller coaster 71 - five birdies and four bogeys - and slipped back into fourth place on ten-under-par. Another veteran, 48 year-old American Juli Inkster, who won the title in 2002, was in third place on 11 after a 69 and she could become the oldest LPGA winner if she does claim the title for a second time on Sunday. But Mexico's Ochoa, the first round leader after a 65, dropped to six shots off the lead after a 70, while two-time former winner Annika Sorenstam was 11 strokes behind after a disappointing 73. Cook fires 67 for lead American John Cook will take a one-shot lead into Sunday's final round of the Senior British Open at Royal Troon after shooting a third round four-under-par 67 on Saturday. Cook took advantage of calmer conditions to equal the lowest round of the week and his six-under-par total of 207 meant he leapfrogged overnight leader Bruce Vaughan. Vaughan was a shot back at five-under after he recovered from a run of four bogeys around the turn to post a 69. Argentine Eduardo Romero (68) sat third at four-under. Australian Greg Norman, equal third in last week's British Open at Royal Birkdale, matched Cook's score to leave him tied for sixth, seven shots of the pace. Reavie keeps lead Chez Reavie stretched his lead at the Canadian Open to three strokes after two rounds and the 26-year-old American had a long night's sleep as well over his nearest rival. Eric Axley made a bogey on his final hole, the par-4 ninth, on Saturday morning when play resumed at the five million-dollar US PGA Tour event, falling to three strokes behind his countryman after his brief morning's work. Reavie, who seeks his first PGA crown, stood on 13-under 129 after 36 holes with Axley reaching the clubhouse in second on 132 and two more early risers, England's Brian Davis and American Nicolas Thompson, sharing third on 133. Lundberg eyes double Sweden's Mikael Lundberg is well placed to capture a second Russian Open title in three years after opening up a one-shot lead in Saturday's third round. Lundberg, who carded a 68, had led on 13 under par alongside compatriot Jarmo Sandelin overnight. A bogey followed at the seventh, but a birdie on the 11th and an eagle three on the 15th kept him a stroke ahead of Jamie Moul, who shot a 64. Benn Barham is two shots further back at 14-under par, tied with Michiel Bothma of South Africa.