Nguyễn Xuân Tứ (born 1987) is a coach who was one of the competitors have tried the first season ever of SASUKE Vietnam.
On SASUKE Vietnam 1, he was one of only 9 competitors went to Stage Three. He was next-to-last runner of the stage, but shockingly failed the dismount of Rumbling Dice.
He returned on SASUKE Vietnam 2, when he missed the top 5 fastest athletes in Stage 2 and won 10 million VND by 2.38 seconds, placed 7th overall of the stage. Then he failed Stage 3, at the transition of Spider Flip.
SASUKE Vietnam 3 was nearly a forgettable season of him, where he timed out at the top in Stage 1A. However, due to the problem of 10 seconds' klaxon sound, he was given a wildcard to continue. Once again, he failed Stage Three, this time was ninja killer Hang Climbing.
However, the true forgettable season of him was in SASUKE Vietnam 4, where he failed right at the second obstacle, Tick Tock, by disqualified for touching the pendulum but not transiting.
He has revenged himself with a ticket to Stage 3 once again in SASUKE Vietnam 5. Before that, he had earned the "Run of the Night" award in Stage 2.