Defending champion Lydia Ko has powered into contention following another impressive round at the LPGA tournament in Ohio.

The New Zealander teenager’s third round was a four-under 67 to follow a 66 on Friday, leaving her in a share of third place with one round to play at the Marathon Classic in Toledo.

It represents a sizeable resurgence from the world No.2, who was 40th after opening with a 71.

Ko is two strokes behind 22nd-ranked Ha Na Jang, who has led through all three rounds and is 11-under.

A further two shots back and four off the lead is Australian, Sarah Kemp, who shot a one-under 70 in her third round.

Baek Kyu-jung is second while a third Korean, world No.1 Inbee Park, is level with Ko among five golfers on nine-under.