Golden duo make coach smile again

When China's Gong Jinjie and Zhong Tianshi won the women's team sprint to secure their country's first track cycling gold it was hard to see their faces under bright red helmets.

But the beaming smile across their French coach's face was clear for all to see.

"It's the best feeling in my sporting life," said Benoit Vetu, who has coached the Chinese sprint team since 2013.