CME Group Tour Championship: Lydia Ko shoots course record in Florida
|CME Group Tour Championship second-round leaderboard|
|-12 L Ko (Nzl); - 9 R O'Toole (USA), S Ryu (Kor); -8 S Kim (Kor), B Recari (Spa); -7 I Chun (Kor), C Hull (Eng), J Korda (USA), M Uribe (Col)|
|Selected others:-2 C Matthew (Sco)|
World number one Lydia Ko shot a course record round to move three shots clear after day two of the CME Group Tour Championship in Florida, as England's Charley Hull dropped off the pace.
New Zealander Ko hit 11 birdies and a bogey for a stunning 10-under-par 62.
Hull, meanwhile, started the day one shot off the lead but the 20-year-old is in a share of sixth, five behind Ko, after a two-under-par 70.
Scotland's Catriona Matthew is 10 shots off the pace after a one-under 71.
"Going into today I just wanted to focus on my game," said Ko.
"Obviously it's a great round and I'm in a better position than I ever could have imagined. Over the weekend I just have to focus on me."