He was beaten by the world no. 10 in the last 32.
Nhat Nguyen put on an excellent performance but was beaten in his last-32 men's badminton match against at the Olympic Games.
The Dubliner - who is ranked 54th in the world - took the world number ten - Wang Tzu-wei - to a deciding third set.
The Chinese Tapei shuttler won the final set 21-12 to take a 2-1 victory.

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