Japan's reigning world champions Mayu Matsumoto and Wakana Nagahara crashed out of the badminton women's doubles at the Tokyo Games on Thursday in a 21-14, 14-21, 28-26 quarterfinal defeat to South Korean pair Kim So Yeong and Kong Hee Yong.Matsumoto and Nagahara rallied from a game down to even a pulsating contest at Musashino Forest Sport Plaza, but the third seeds proved to be the architects of their own downfall, failing to convert several match points in a nerve-shredding final game."It hurts that we weren't able to show what we are made of at the end," said Nagahara. "I feel bad for a…READ FULL ARTICLE