ABU DHABI: Martin Kaymer – a three-time champion of the Abu Dhabi Championship – was back on top of the leader board on Friday at the $2.7 million Abu Dhabi Championship, a second successive round of six-under par 66 giving the German a one-shot lead at the halfway stage. The 32-year-old, also a two-time major champion, made two bogeys during his round, but compensated with an eagle and six birdies. At 12-under par 132, he was one ahead of Spain’s Rafael Cabrera-Bello, who shot a 66 himself that included three birdies in his final three holes. Overnight leader, Sweden’s Henrik Stenson completed a battling round of one-under par 71 to slip to tied sixth at nine-under par, with three young stars – England’s Tommy Fleetwood (67), Ireland’s Paul Dunne (66) and Thailand’s Kiradech Aphibarnrat (68) – leapfrogging him to tied-third place at 10-under par.