Vietnam’s head coach, Kim Sang-sik, attributes his team’s recent victory over Indonesia in the ASEAN Cup 2026 qualifiers to a superstitious belief in the color black. Following the win at Pakansari Stadium, Coach Kim instructed his wife to remove all white shirts from their wardrobe. He firmly believes that wearing black apparel brings good fortune to the team. This unusual request highlights the coach's commitment to fostering a positive atmosphere within the squad. The win advanced Vietnam’s standing in Group A of the ASEAN Cup 2026 qualifiers. While seemingly unconventional, Kim's tactic underscores the psychological aspects often present in competitive sports. This reliance on a lucky charm indicates a desire to maintain momentum and confidence within the team.