Singapore's Gao Ning and Li Hu successfully defended their men's doubles title at the International Table Tennis Federation World Tour Grand Finals in Dubai, beating Chiang Hung-chieh and Huang Sheng-sheng of Chinese Taipei in a seven-game thriller.

The Singapore duo, top seeds in the tournament, won the match 6-11, 12-10, 12-10, 8-11, 11-8, 7-11, 11-9.

But their team-mates Feng Tianwei and Yu Mengyu failed to retain their title in the women's doubles, when they were booted out of the tournament in their opening match by German duo Zhenqi Barthel and Shan Xiaona.

They lost 3-11, 11-9, 5-11, 13-11, 5-11, 10-12.