1977-08-21 Luis Estaba w rsc 11 (15) Juan Alvarez, Luis Ramos Gym, Puerto Le Cruz, Venezuela - WBC
1977-08-21 Luis Estaba w rsc 11 (15) Juan Alvarez, Luis Ramos Gym, Puerto Le Cruz, Venezuela - WBC. Referee: Ismael Quinones-Falu. Retaining his title for the ninth time, Estaba (107¼) once again showed a great defence and the ability to pace himself, using his long reach to outbox the aggressive Alvarez (107½) before forcing the stoppage. Although Alvarez was nearly always going forward it proved to be his undoing in the seventh round when he ran into a left-right combination that put him down for ‘eight’. Estaba, continuing to box at long range, cut Alvarez over the left eye in the ninth and after pounding away at the injury in the tenth the referee had seen enough and pulled the challenger out of the fight immediately before the 11th got underway.