Nasa Hataoka holds a commanding four-shot lead after the opening round of the Marathon LPGA Classic in Ohio, USA. The Japanese was flawless on Thursday, landing five birdies by the turn and another five after, to top the leaderboard at 10-under. American Laura Stephenson is second at six-under, while Finn Matilda Castern, Americans Mina Harigae and Yealimi Noh, Thai Ariya Jutanugarn and Taiwan's Ssu-Chia Cheng are tied for third at five-under.