Ireland's Stephanie Meadow is mixing it with the big names on the LPGA Tour at the halfway mark of the Canadian Women's Open.

The 24-year-old, fresh off her experience at the Olympics in Rio, lies just three shots off the pace after the opening two rounds after following up a cracking opening 66 with a three-under-par round of 69.

That opening 18 was good for the overnight lead, and the nine-under total put the world No.419 in a tie for second, alongside South Korea's Chun In-Gee, behind Ariya Jutanugarn.

The Thai star set her sights on a fifth victory this year by firing a bogey-free 64 in the second round to move to 12-under and take command.

The second ranked player in the world, Jutanugarn won the Women's British Open in her last event but withdrew from the third round at the Rio Olympics with a knee injury.

World No.1 Lydia Ko, seeking her fourth Canadian Women's Open, is four shots behind at eight-under-par after shooting a three-under second round.