Reigning men's doubles world champions Aaron Chia-Soh Wooi Yik fell short again and suffered another disappointing br 10-21, 21-23 defeat at the hands of China's world No. 6 Liu Yuchen-Ou Xuanyi in the second round of the Malaysia Open on Thursday night.br br And now only two Malaysian pairs - Ong Yew Sin-Teo Ee Yi and Chen Tang Jie-Toh Ee Wei - are left standing to shoulder the challenge in the quarterfinals.