Julio Chavez Overpowers Roger Mayweather This Day May 13, 1989
- WBC World super lightweight title
- Roger Mayweather 138¾ lbs
- Julio Cesar Chavez 140 lbs
- 10 of 12
- Location: Great Western Forum, Inglewood, California, USA
- Referee: Henry Elesperu
- Judge: Franz Marti 92-99
- Judge: Chuck Hassett 92-98
- Judge: Tamotsu Tomihara 92-98
Mayweather retires after round 10, complaining of stomach cramps.
Marti had Chavez ahead 99-92, while the other two judges favored Chavez, 98-92.