Two-time champion Lee Chong Wei fended off a spirited challenge from Boonsak Ponsana to win the men’s singles title at the Chinese-boycotted Japan Open badminton tournament on Sunday. The Malaysian top seed, the winner in Japan in 2007 and 2010, powered his way through to a 21-18, 21-18 victory over the Thai. In the women’s singles final, Tai Tzu-ying of Taiwan dashed any hopes of a title for Japan by beating Eriko Hirose 9-21, 21-9, 21-14. “It was really a good match, but it was tough,” said Lee, 29. “This is my first tournament after the London Olympics.”