Thai media directly points out 3 secrets behind U23 Vietnam's dominance in Southeast Asia

Siamsport emphasizes that iron discipline, outstanding fitness foundation, and a practical football approach are the three key factors helping Coach Kim Sang-sik enhance U23 Vietnam's power.

The strong rise of U23 Vietnam with a 3rd place finish at the 2026 AFC U23 Championship has attracted special attention from regional experts. Recently, Thailand’s leading sports newspaper Siamsport conducted an in-depth analysis, pointing out systematic changes implemented by Coach Kim Sang-sik to build a united and distinctive team.

According to this newspaper, U23 Vietnam’s success is not a temporary phenomenon but stems from three crucial factors.

The first aspect emphasized by Siamsport is the Korean-influenced discipline. Coach Kim Sang-sik not only demands strict tactical compliance on the pitch but also establishes a rigorous system controlling lifestyle, nutrition, and schedules.

“Discipline is the fundamental base. This comprehensive approach directly impacts defensive structure, positioning, and stability in play, helping to minimize errors that have been weaknesses for many ASEAN teams,” the Thai newspaper states. Training professional awareness down to the smallest details has enabled young Vietnamese players to operate a scientific playing style and greatly reduce individual mistakes.

Under Coach Kim Sang-sik’s leadership, U23 Vietnam has showcased an energetic style with continuous pressing. The team maintains high intensity throughout 90 minutes, marking a significant improvement in physical condition.

Analyzing this aspect, Siamsport comments: “Teams led by Korean coaches are often remembered for their vigorous play, high intensity, and quick transitions from defense to attack — key elements requiring exceptional fitness,” This endurance allows U23 Vietnam to smoothly execute a pragmatic philosophy, prioritizing solidity and sharp counterattacks.

Finally, a deep understanding of East Asian culture has helped the Korean strategist build absolute trust from his players. Coach Kim skillfully manages team relationships, creating a family-like friendly atmosphere while maintaining strict hierarchy and order.

Additionally, running the team with a system of experts including video analysts and fitness coaches ensures continuous development. Siamsport concludes:

“The success of Korean coaches comes from a combination of discipline, tactics, and systematic methods that effectively harness players’ potential,” The harmony between people and technology has enabled Coach Kim Sang-sik to turn U23 Vietnam into a formidable force on the continental stage.