Regarding some concerns surrounding Son Heung-min’s performance, former coach Cha drew a clear line. Although recovery may slow down as he gets older, his firm belief is that his world-class skills will never disappear overnight. In particular, former coach Cha mentioned his experience participating in the 1986 World Cup at the age of 33, and showed that he understands more deeply than anyone else the psychological and physical burden that 34-year-old Son Heung-min is experiencing. Even though Son Heung-min was used as a front-line striker and could not directly score a goal, the analysis showed that the so-called 'invisible contribution' of pulling the opponent's defense and creating space for his teammates is playing a key role in the team's strategic victory.

However, former coach Cha's diagnosis did not stop at simply defending Son Heung-min as an individual, and also added a positive evaluation of the overall growth of Korean soccer in the weight class. Unlike in the past when they were overwhelmed and unable to show off their skills on a big stage like the World Cup, I highly praised the fact that our players are now naturally showing off their skills at 100% based on the wealth of experience they have accumulated in overseas leagues. His cool-headed analysis is that with this level of confidence and performance, he can easily aim to advance to the quarterfinals in this tournament. The fighting spirit and confidence that players show on the pitch will be important assets for the next generation, and with continued support from fans, Korean soccer will be able to lay the foundation for soaring to greater heights.

On the other hand, former coach Cha's evaluation of Japanese soccer was very cold and painful. He asserted that Japan has already established a system at a level that we cannot follow, and strongly warned that Korean soccer must come to its senses. Rather than simply relying on luck or the genius of a certain generation, Japan's real weapon is that it has the 'structural completeness' to implement the same football philosophy no matter which player is sent by benchmarking Germany's youth system from 30 years ago. The systematic youth development policy led by the association became the practical foundation for Japan to claim victory in the World Cup, proving the power of Japanese soccer, which values ​​consistent organizational power rather than flashy individual skills.

The gap between Korea and Japan pointed out by former coach Cha ultimately stems from the presence or absence of a ‘sustainable system’. Although the level of domestic professional leagues has improved compared to the past, there are still gaps compared to Japan's solid infrastructure, and this gap is clearly revealed in the difference in performance on the international stage. He acknowledged the qualitative difference that occurs at the youth level and emphasized the need to redesign the foundation of Korean soccer from a long-term perspective rather than gloating over immediate results. This is not a problem that can be solved in a short period of time, and it is also a heavy message that the entire soccer world should learn from the example of Japan, which prepared 30 years from now with insight into the future.