Ep. 10: Carlos and Joe face off in a snowy park during the Christmas season
Aired on December 15, 1980

The atmosphere in the slums is festive as Christmas arrives and snow begins to fall. Inside, Carlos and Joe both harbor a quiet, burning desire. In the snow-covered park, Joe issues a challenge to Carlos, proposing a fight to determine who is the superior fighter. However, Carlos does not intend to accept this duel. Instead, he has devised a different plan to resolve the conflict between them, diverging from Joe's expectation of a direct confrontation.
Episodes
- Ep. 6 · Joe trains to overcome his psychological block against Koji Nango despite his temple strike limitation.
- Ep. 7 · Joe Yabuki faces career uncertainty as no club organizes a bout
- Ep. 8 · Danpei Disappears to End Joe's Career as Joe Trains for Carlos Rivera
- Ep. 9 · Joe Breaks Free from Toru's Influence During Sparring with Carlos
- Ep. 10 · Carlos and Joe face off in a snowy park during the Christmas season
- Ep. 11 · Joe and Carlos begin their intense New Year's Day boxing match
- Ep. 12 · Joe Endures Carlos' Relentless Assault After Losing Consciousness
- Ep. 13 · Joe's fight ends as the group prepares Nishi's retirement party while he struggles with his inability to box.
- Ep. 14 · Joe visits Shiraki Gym to collect prize money and learns of Carlos's defeat by the World Champion.