Defending champion Lee Chong Wei produced one of his finest performances to retain the men's singles title with a straight-game victory over Chen Long of China in the finals of the India Super Series Badminton in New Delhi yesterday.World number one Lee of Malaysia defeated Chen 21-13, 21-17 to clinch his third title of the season.In an all-Chinese women's singles final, second seed Shixian Wang, overcame top seed Li Xuerui 22-20, 21-19. China also clinched the women's doubles title with Yuanting Tang and Yang (F) Yu, prevailing over Korean pair of Kyung Eun Jung and Ha Na Kim 21-10, 13-21, 21-16.