Angela Yin birdied the last to hold off charging Japanese rookie Akie Iwai and win the Honda LPGA Thailand by a shot thanks to a bogey-free 65.

As Leona Maguire overcame making triple bogey eight at the first and posted a second successive two-under 70 to finish tied for 33rd on six-under, Yin (26) claimed her second LPGA win on 28-under from Iwai, who closed with a brilliant 61.

"I've never played the final round with a five-shot lead," Yin said. "I knew I wasn't super comfortable. It's not a tournament or golf course where five shots is a lot.

"Considering that Akie shot Thursday 10-under, I knew she was able and capable of shooting a low score…

"I knew I just needed to keep playing how I was playing and we'll see what happens. My physio said if it's mine, it's mine. I think it's mine."

Yin, who shot an eight-under 64 to lead by five shots from Iwai overnight, saw the Japanese rookie get within a shot when she played her first 15 holes in 10 under.

But Iwai bogeyed the 17th to give Yin a two-shot lead heading to the 18th and while the Japanese star made an eagle three, Yin made birdie to win by one stroke.

As for the key to her win, Yin said: "Probably 17. I hit it tight, and then Akie went long, and then I was like, okay, well, she could make a brilliant up-and-down, and I needed to make my birdie.

"She almost did pull off that brilliant up-and-down, but I got lucky.

"Then coming into 18, it's the most amazing thing you can see and the hardest pin on the golf course, and everybody was on from 200-plus out, and she made eagle.”

Maguire took at eight at the first hole but rallied with birdies at the fifth, seventh and eighth to get back to level for the day at the turn.

She then finished with birdies at the 16th and 18th to continue her solid start to the season which she continues with the HSBC Women's World Championship in Singapore this coming week.

On the PGA TOUR, South Africa's Aldrich Potgieter has a one-shot lead heading into the final round of the Mexico Open at VidantaWorld.

The big-hitting rookie (20) was three strokes ahead with two holes of his third round remaining but pushed his tee shot into bushes and bogeyed the par-three 17th, then had to make a five-footer for par at the 18th.

A four-under 67 that gave him just a one-shot lead on 20-under over Californian Brian Campbell  (31) as he seeks a win that would earn him his second trip to the Masters.

He's also hoping to learn from playing in the final group at the Farmers Insurance Open at Torrey Pines, where he closed with a 78 to slip to tied 15th.

"Yeah, Torrey was a really beast of a golf course, it was really tough conditions as well," Potgieter said." I just had one really terrible hole where I just couldn't get momentum from that afterwards.

"Hopefully, we don't have that tomorrow, and we'll just make a lot of birdies. Just trying to do the same thing we did the last two days, three days. Even like today, played really good and I was happy with how I was hitting it."

Campbell shot a bogey-free, seven-under 64 to sit alone in second while Germany's Stephan Jaeger, who held off Scottie Scheffler to win the Texas Children's Houston Open last year, is two shots further back after a 66.

Alex Smalley shot 64to trail Potgieter by five shots with Aaron Rai (68) and Ben Griffin (67) six behind.

Justin Hastings of the Cayman Islands, the San Diego State senior who won the Latin American Amateur last month to earn a trip to the Masters, shot 65 to share ninth place with Patrick Rodgers and Nicolai Højgaard, who twice chipped in for eagle on the back nine.

In addition to a trip to the Masters, the winner will also get starts in The Players, the PGA Championship and five of the remaining Signature Events.