On the afternoon of July 29 (Vietnam time), swimmer Nguyễn Huy Hoàng competed in the men's 800m freestyle heats at the Olympic 2024.
He started in lane 2. After the first 300m, the trio of swimmers Henveaux Lucas (Belgium), Auboeck Felix (Austria), and Sibirtsev Ilya (Uzbekistan) created a significant gap from the chasing group. Nguyễn Huy Hoàng was in 5th place with a time of 2 minutes 58 seconds 26.
The Vietnamese swimmer continued to maintain this position after the first 500m, but at that point, Huy Hoàng's time was 5 minutes 0 seconds 47, 5 seconds behind the leader. The representative of Vietnam began to fall behind after completing 600m.
At the end of the first group of heats, Austrian swimmer Auboeck Felix finished first with a time of 7 minutes 48 seconds 49. Garach Benito Carlos (Spain) made an impressive surge to finish second with 7 minutes 50 seconds 07. Henveaux Lucas (Belgium) came in third with 7 minutes 51 seconds 51.
Nguyễn Huy Hoàng finished in 5th place with a time of 8 minutes 08 seconds 39, 19.90 seconds behind the leader. This time was significantly slower than the 7 minutes 51.44 seconds he achieved at ASIAD 19. This result prevented the Vietnamese swimmer from qualifying for the men's 800m freestyle final.