Teenage sensation Lydia Ko and South Korean Seon Woo Bae share the lead after two rounds of the New Zealand Women&aposs Open. Heading into the last round, 15-year-old amateur Ko and Bae are tied at six-under, one shot ahead of Italian Giulia Sergas at the Clearwater Golf Club in Christchurch. New Zealand&aposs Ko carded a four-under-par round of 68 to go with her 70 on Friday, while Bae produced the round of the day with a stunning course-record eight-under 64 to rocket up the leaderboard. Starting on the back nine, Ko made four consecutive pars before a brilliant eagle on the par-five 14th got her round going. She added three more birdies before a bogey on the 7th soured her round slightly. Bae shot a staggering nine birdies, but like her co-leader, had trouble on the par-four 7th where she carded her only bogey. Sergas remains in the hunt at five-under after a solid 68 on Saturday. Australian Nikki Campbell, who held the lead after the first round, could only manage a 71 as she slipped to outright fourth place at four-under. Compatriot Stacey Keating is a shot back in fifth place alongside Spain&aposs Belen Mozo, American Amelia Lewis and South Korean Min Sun Kim, while another five players are a further stroke back. Overnight leaders Tamara Johns and Sarah Oh both had disappointing days with a 75 and 76 respectively seeing them drop off the pace.