Koreans So Yeon Ryu and Na Yeon Choi crushed the London Hunt and Country Club course at the LPGA Canadian Pacific Women's Open in Ontario. [caption id="attachment_6507" align="alignnone" width="620"] So Yeon Ryu / Getty Images [/caption] So Yeon Ryu shot an amazing bogey free -9 under par 63 to top the leaderboard at the CP Women's Open, while Na Yeon Choi secured the second spot with her -8 under par 64, which included one bogey, at London Hunt and Country Club in Ontario. So Yeon is aware that one good round does not win a tournament, she and Na Yeon have spoken about the lack of success; “I shot 11-under when I was playing in the 2012 Australian Masters, but I couldn’t win the tournament, but I hope I can win this tournament this time." “It was a really great opportunity to make us more honest to each other, then we talked about how hard it is getting through tough times. Na Yeon won U.S. Open and CME two years ago, then hasn’t won anything, and I’m kind of in the same situation. So we talk about how we can get through this one, how do we think about this situation. Then Na Yeon and I both were kind of sad, so I realized I’m not the only one going through the hard times.” ''I haven't won any tournaments the last two years so I've been waiting. I wish I can win this week.'' Na Yeon said she had played well, but did not realise how many birdies she in a row, predicting earlier that around -15 would be good enough to win; ''I felt good about my game, but I didn't really realize I had five birdies in a row, didn't really think about I want to birdie every hole.'' 'Actually I was thinking like under 15, but after my score today, which means, if I shoot like 8 under, I think everyone could shoot like 8-under, so we will see.'' Anna Nordqvist is in third place, carding -7 under par 65 for her opening effort, she spoke about the round of So Yeon, and the good condition of the London Hunt and Country Club course; “She made nine birdies today and I made seven, so it gives you a lot of momentum, a lot of positive energy, just seeing a lot of birdies.” " The course is great, it’s a treat to come here. Some of them were a little bit bumpy, but it’s been a long day, a lot of play on these greens. But overall you can put yourself in position to make a lot of birdies out here, and that’s what I felt I did. It’s going to be a fun tournament, this one.” Lydia Ko must win to have a chance to move to world No. 1 but she carded a first round of -2 under par 70, which makes the task harder. Inbee Park can ascend to No. 1 if she wins and Stacy Lewis finishes in a four-way tie for second or worse. Inbee is in a good position following her first round -6 under par 66 while Stacy struggled to a -1 under par 71. It is all to play for with those who are concerned with the World Number One position.