Defending champion Lee Chong Wei produced one of his finest performances to retain the men's singles title with a straight-game victory over familiar foe Chen Long of China in the final of the US $250,000 Yonex Sunrise Metlife India Super Series in Delhi on Sunday. In an all-Chinese women's singles final, All-England champion Shixian Wang, seeded second, kept her cool at crucial moments to overcome Olympic champion and top seed Li Xuerui 22-20, 21-19 in 47 minutes.