Here's why:
* Internal Conflict: The main conflict in the story is the internal struggle Antonio and Felix face. They are best friends who are also fierce boxing rivals. They must balance their friendship with their competitive desire to win.
* External Conflict: While the boxing match is the external conflict, it's not driven by a villainous opponent. Both boxers respect each other and see the match as a test of their skills, not a personal attack.
* Themes of Friendship & Respect: The story emphasizes the importance of friendship and respect, even in the face of intense competition. The antagonist is not an enemy, but the pressure of the situation and the need to prove themselves.
Therefore, "Amigo Brothers" lacks a traditional antagonist. The conflict is internal and driven by the characters' own ambitions and desires, highlighting the complexities of friendship and competition.