In Blue Lock Chapter 328, we witness one of the series' most powerful moments to date. Isagi comes to terms with his own beliefs as he talks to his coach, who is also his mentor, about how he wants to push past those beliefs.
This chapter reveals a clear visual connection between how Isagi wears number 11 and how Ego did as well. When we finally see Ego's past as a player wearing number 11, we understand why this is important. It shows us that Isagi isn’t just following Ego. He is the one who comes after him and will do what Ego hasn’t been able to do.

Blue Lock fans have long wondered about Jinpachi Ego's history before creating the controversial training program. Chapter 328 finally provides answers through a haunting flashback sequence. Jinpachi found out that, during his playing days, he did something that he calls "God of Soccer." In other words, for seven minutes, he felt he was in perfect harmony with everything on the field around him, and that is when he experienced a moment of perfect synchronicity.
During this revelation, readers see Ego in his playing days. There is a supernatural or harpy-like presence around Jinpachi in his playing days, showing that he had this higher, divine experience on the pitch. Also, the number on his jersey was 11, just like what Isagi is currently wearing in the Blue Lock timeline.
Two types of players, one ultimate goal

Jinpachi Ego believes there are two different players in soccer: the genius (born with talent) and the one who learns (through practice). In Blue Lock, he teaches these two players to compete against one another to help each get better, which allows for unlimited potential growth for both the genius and the one who learns. The competition creates growth in all aspects of the game.
While Ego dealt with his "divine" moment on his own, Isagi has had the benefit of competing with the best players in the world. The Neo Egoist League is what creates that competition. Isagi's number 11 jersey represents not just Ego's past, but the optimized path Ego designed for surpassing his own limitations.
What does the "God of Football" really mean in Blue Lock?

Ego's concept of a football deity differs dramatically from simply naming legendary players like Zico or Maradona. He describes something unscientific and invisible, a state where perfected thoughts and effort create seemingly supernatural results. Things happen that shouldn't happen, like lucky breaks, being at the right place at the right time, and following the stars; something about it doesn't have a logical reason why.
This idea raised the bar and changed the whole game with Blue Lock. It was all about who would be the best player on the Japanese national team. But instead, they showed that Ego has bigger goals than just picking a national team. He is trying to create, and eventually outdo, his own brief experience of being caught up in the magic of football.
Earlier in Blue Lock, Ego shared a couple of formulas that represent his scientific attempts to recreate the flow state and luck that he experienced in playing. He stated that he no longer enjoyed playing since he was no longer able to produce those feelings, but instead devoted himself to an environment where other people could produce this feeling on a permanent basis.
In Blue Lock Chapter 328, Isagi declares very boldly that he is going to meet the God of Football, and Ego challenges him to surpass his own creator. This is very much a "full circle" moment for their relationship, and the end narration of the chapter reiterates that Isagi's commitment to being the world's best has now been fully ignited.