Ryu remains on top in Ontario

London, ON (SportsNetwork.com) - So Yeon Ryu carded a 5-under 67 on Saturday as she remained on top of the leaderboard at the Canadian Pacific Women's Open.

Ryu, a two-time winner on the LPGA Tour, finished three rounds at London Hunt and Country Club at a tournament record 20-under-par 196. Her last win came at the 2012 Jamie Farr Owens Toledo Classic.

"I haven't won a tournament in the last two years. It's a really tough time for me. If I'm going to win this tournament, I'm going to have to break that, so I really want to break it," said Ryu.

Azahara Munoz tied the course record with a 9-under 63 to vault into a tie for second place with Na Yeon Choi (66) at 16-under 200.

Inbee Park (65), who is coming off her fifth career major victory at the LPGA Championship, is alone in fourth at minus-14. Anna Nordqvist (69) is in fifth at 13-under.

Ryu entered the day with a 5-shot lead, but Choi quickly cut into that advantage with a birdie at the second.

After Ryu tripped to her first bogey of the tournament at the third to fall to 14-under, Choi rolled in back-to-back birdies at the fourth and fifth to pull within one of the lead at minus-13.

But Ryu answered with back-to-back birdies at the sixth and seventh to jump to 16-under and regain a 3-stroke advantage.

Munoz, meanwhile, had started to make her run up the leaderboard with birdies at the first, fifth and seventh during her front nine.

She then caught fire around the turn, following back-to-back birdies at the 11th and 12th with another gain at the 14th to meet Choi at 13-under.

Ryu briefly moved four clear of them with a birdie at the 10th, but Choi answered with a birdie at the 11th to get back within three of the lead.

Munoz, however, stayed hot with birdies at the 15th, 16th and 17th to move to 16-under and pull within two of Ryu, who had birdied the 13th to reach minus-18. Munoz parred the 18th to end at 16-under.

"I had so many chances and then I made lots of putts. I made a couple of really long ones and quite a few shorter ones," said Munoz. "I'll take this one. I am really happy with my round."

Ryu added to her lead with birdies at the 16th and 17th to move four clear of Munoz at minus-20.

Choi also birdied Nos. 16 and 17 to earn her share of second place with Munoz.

NOTES: Ryu also holds a share of the course record as she shot a 63 on Thursday ... The previous 54-hole tournament record was a 199 by Lydia Ko, which she set last year ... Ryu has nine top-10 finishes this season and 27 top-10 finishes since her last win ... Two-time defending champion Ko is tied for 33rd place at 5-under 211.

08/23 18:31:28 ET