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05/25 14:19 CDT Chisato Iwai wins Mexico Riviera Maya Open by 6 shots for first LPGA title Chisato Iwai wins Mexico Riviera Maya Open by 6 shots for first LPGA title PLAYA DEL CARMEN, Mexico (AP) --- Chisato Iwai took a tournament up for grabs and turned it into her own highlight show Sunday, making five birdies in her opening six holes for a 6-under 66 and a six-shot victory in the Mexico Riviera Maya Open for her first LPGA title. Iwai led from the opening hole at El Camaleon when she made birdie and Jenny Bae made bogey, and the 22-year-old from Japan was on her way. "My mental is so calm --- calm every day, every time," Iwai said. She ran off four straight birdies, poured in every putt that mattered and then cruised home to become the third LPGA rookie to win this season. Iwai, whose twin sister Akie Iwai has been runner-up twice this year, finished at 12-under 276. Bae had a one-shot lead going into the final round at Mayakoba, and the 10 players behind her also had never experienced winning on the LPGA Tour. It didn't take long for Iwai, who had eight wins on the Japan LPGA before getting her LPGA card, to turn this into a rout. She hit wedge to 4 feet on the third hole for birdie. She rolled in a 7-foot birdie putt on the fourth. Her approach to the par-5 fifth was right of the green, close to the water, and she calmly chipped that to 2 feet for a third straight birdie. Iwai finished the big birdie run with a 15-foot putt on No. 6. Bae bogeyed the opening two holes and never caught up. She steadied herself on the back nine to salvage a 73 and a runner-up finish. "It just tells me that I have a long ways to go but also I'm also getting there, too," Bae said. "So I'm happy. I definitely know what I need to work on for the week off for me. Hopefully I'll be able to score better at the next tournament." The six-shot victory for Iwai matched the largest margin this year. Rio Takeda of Japan also won by six at the Blue Bay LPGA in China. Iwai took off early and it seemed as though everyone simply cleared out of her way. Gabriela Ruffels, who birdied five of her last six holes on Saturday to get within two shots of the lead, made only one birdie in her round of 76. Miranda Wang, who stayed in the game with clutch par putts down the stretch in the third round, closed with a 76 without making a birdie. Yahui Zhang made bogey on six of her last seven holes for a 78. Iwai won $375,000 for her first title. It's the first time in 10 years the LPGA has had three rookies win before the end of May. The LPGA returned to Mexico for the first time since 2017 and didn't attract a strong field with the U.S. Women's Open next week at Erin Hills is Wisconsin. Charley Hull at No. 15 was the highest-ranked player in the field. She didn't break 70 all week and tied for 32nd. ___ AP golf: https://apnews.com/hub/golf