Germany's Marcel Siem replaced India's Jeev Milkha Singh at the top of the leaderboard at the Irish Open after a superb finish to his second round Friday. Siem eagled the long 16th to join Singh and Denmark's Soren Hansen in first place and then birdied the next hole to move into sole possession of the lead. He finished with his second successive round of 66, one shot in front of Singh and Hansen and a further shot ahead of Spain's former Ryder Cup player Ignacio Garrido, who finished with three birdies for a 65. Meanwhile, England's Simon Wakefield came on strong late in his round and birdied the 16th and 17th to reach seven under, which was enough to finish the day level in fifth place with Raphael Jacquelin of France. Darren Clarke and Padraig Harrington both missed the cut, leaving Rory McIlroy and Graeme McDowell to fill the void for the Irish crowds. McIlroy grabbed three late birdies for a second round 68, while fellow Northern Irishman McDowell went two better than that to put both of them on four under par at halfway. Masson takes lead Playing in the final group, Germany's Caroline Masson shot a flawless seven under par 65 to take the surprise halfway lead at the Women's British Open at Carnoustie Friday. The 22-year-old finished a shot ahead of the field on 11 under par. Masson finished one ahead of two South Koreans — first round leader, Lee Meena (69), and Park Inbee (64). Pak Se-ri was in the next group on eight under, while defending champion, Yani Tseng, was well within striking range on seven under following a 66. Immelman grabs lead In West Virginia, South Africa's Trevor Immelman fired a six-under par 64 Thursday to grab a one-stroke lead after the opening round of the $6 million Greenbrier Classic. Immelman made all his moves relative to par on even-numbered holes to claim a one-stroke lead over Australian Steven Bowditch and Americans Billy Mayfair, Derek Lamely, Webb Simpson and Gary Woodland.