PR v. Mex title/signif. bouts:

[Illmatic]

i was talkin to my ese dude about the forgotten mx v pr bouts...tryin to make a list...

Sixto Escobar v. Baby Casanova
Carlos Ortiz v. Baby Ramos
Carlos Ortiz v. Battling Torres
Cocoa Kid v. Kid Azteca (4x)
Wilfredo Vazquez v. Orlando Canizales
Hector Camacho v. Jose Luis Ramirez
Hector Camacho v. Oscar de la Hoya
Hector Camacho v. Julio Cesar Chavez
Hector Camacho v. Rafael Limon
Wilfredo Gomez v. Lupe Pintor
Wilfredo Gomez v. Salvador Sanchez
Wilfredo Gomez v. Carlos Zarate
Edwin Rosario v. Julio Cesar Chavez
Edwin Rosario v. Jose Luis Ramirez I
Edwin Rosario v. Jose Luis Ramirez II
Felix Trinidad v. Yory Boy Campas
Felix Trinidad v. Oscar de la Hoya
Felix Trinidad v. Fernando Vargas
Ivan Calderon v. Hugo Cazares
Ivan Calderon v. Hugo Cazares II
Juan Manuel Lopez v. Daniel Ponce de Leon
Jose Antonio Rivera v. Alejandro Garcia
Daniel Santos v. Antonio Margarito I
Daniel Santos v. Antonio Margarito II
Miguel Cotto v. Antonio Margarito


best rivalry...period.

[Illmatic]

Ricky Quiles v. Julio Diaz
Jose Miguel Cotto v. Juan Diaz

[Illmatic]

Juan LaPorte v. Salvador Sanchez
Wilfred Benitez v. Carlos Palomino
Juan LaPorte v. Julio Cesar Chavez
Kermit Cintron v. Antonio Margarito I
Kermit Cintron v. Antonio Margarito II
Nelson Dieppa v. Hugo Cazares I
Nelson Dieppa v. Hugo Cazares II
Eric Morel v. Martin Castillo
John John Molina v. Manuel Medina
John John Molina v. Goyo Vargas
Nelson Dieppa v. Ulises Solis

[Igor]

Here's a list from boxingscene that I bookmarked a while ago. They're all title fights, but the list includes some non-significant matches like Juanma-Figueroa.

Mexico - 35
Alberto Jimenez vs Jose Lopez (WBO flyweight)
Antonio Margarito vs Kermit Cintron I (WBO welterweight)
Antonio Margarito vs Kermit Cintron II (IBF welterweight)
Antonio Margarito vs Miguel Cotto (WBA welterweight)
Carlos Zarate vs Andres Hernandez (WBC bantamweight)
Enrique Sanchez vs Rafael Del Valle (WBA super bantamweight)
Erik Morales vs Angel Chacon (WBC super bantamweight)
Fernando Montiel vs Jose Lopez (WBO flyweight)
Genaro Leon vs Danny Garcia (WBO welterweight)
Gilberto Roman vs Juan Carazo (WBC super flyweight)
Hugo Cazares vs Alex Sanchez (WBO light flyweight)
Hugo Cazares vs Nelson Dieppa I (WBO light flyweight)
Hugo Cazares vs Nelson Dieppa II (WBO light flyweight)
Isidro Garcia vs Jose Lopez (WBO flyweight)
Isidro Perez vs Angel Rosario (WBO flyweight)
Jose Luis Ramirez vs Edwin Rosario II (WBC lightweight)
Jose Quirino vs Jose Ruiz (WBO super flyweight)
Julio Cesar Chavez vs Angel Hernandez (WBC light welterweight)
Julio Cesar Chavez vs Edwin Rosario (WBA lightweight)
Julio Cesar Chavez vs Hector Camacho (WBC light welterweight)
Julio Cesar Chavez vs Juan La Porte (WBC super featherweight)
Julio Cesar Chavez vs Sammy Fuentes (WBC light welterweight)
Marco Antonio Barrera vs Daniel Jimenez (WBO super bantamweight)
Marco Antonio Barrera vs Orlando Fernandez (WBO super bantamweight)
Martin Castillo vs Eric Morel (WBA super flyweight)
Oscar De La Hoya vs John John Molina (WBO lightweight)
Oscar De La Hoya vs Hector Camacho (WBC welterweight)
Oscar De La Hoya vs Wilfredo Rivera (WBC welterweight)
Pipino Cuevas vs Angel Espada I (WBA welterweight)
Pipino Cuevas vs Angel Espada II (WBA welterweight)
Pipino Cuevas vs Angel Espada III (WBA welterweight)
Ricardo Lopez vs Alex Sanchez (WBC/WBO minimumweight)
Salvador Sanchez vs Juan La Porte (WBC featherweight)
Salvador Sanchez vs Wilfredo Gomez (WBC featherweight)
Victor Burgos vs Alex Sanchez III (IBF light flyweight)

Puerto Rico - 40
Alex Sanchez vs Victor Burgos I (WBO minimumweight)
Alex Sanchez vs Oscar Andrade (WBO minimumweight)
Alex Sanchez vs Rafael Orozco (WBO minimumweight)
Alex Sanchez vs Tomas Rivera (WBO minimumweight)
Alfredo Escalera vs Sigfredo Rodriguez (WBC super featherweight)
Carlos De Leon vs Alvaro Yaqui Lopez (WBC cruiserweight)
Carlos Ortiz vs Reymundo Battling Torres (World Light Welterweight)
Daniel Santos vs Antonio Margarito II (WBO light middleweight)
Daniel Santos vs Ramon Luis Campas (WBO light middleweight)
Edwin Rosario vs Jose Luis Ramirez 1 (WBC lightweight)
Eric Morel vs Isidro Garcia (WBA flyweight)
Eric Morel vs Gilberto Keb Baas (WBA flyweight)
Esteban De Jesus vs Vicente Saldivar (WBC lightweight)
Felix Trinidad vs Oscar De La Hoya (WBC/IBF welterweight)
Felix Trinidad vs Ramon Campas (IBF welterweight)
Hector Camacho vs Jose Luis Ramirez (WBC lightweight)
Hector Camacho vs Rafael Limon (WBC super featherweight)
Ivan Calderon vs Hugo Cazares I (WBO light flyweight)
Ivan Calderon vs Hugo Cazares II (WBO light flyweight)
Ivan Calderon vs Lorenzo Trejo (WBO minimumweight)
Ivan Calderon vs Roberto Carlos Leyva (WBO minimumweight)
John John Molina vs Goyo Vargas (IBF super featherweight)
John John Molina vs Manuel Medina (IBF super featherweight)
Jose De Jesus vs Isidro Perez (WBO light flyweight)
Jose De Jesus vs Fernando Martinez (WBO light flyweight)
Jose Ruiz vs Armando Velasco (WBO super flyweight)
Josue Camacho vs Eddie Vallejo (WBO light flyweight)
Juan Manuel Lopez over Cesar Figueroa (WBO super bantamweight)
Juan Manuel Lopez over Daniel Ponce De Leon (WBO super bantamweight)
Miguel Cotto vs Alfonso Gomez (WBA welterweight)
Nelson Dieppa vs Ulises Solis (WBO light flyweight)
Sammy Fuentes vs Fidel Avendano (WBO light welterweight)
Sammy Fuentes vs Hector Lopez (WBO light welterweight)
Wilfred Benitez vs Carlos Palomino (WBC welterweight)
Wilfredo Gomez vs Carlos Zarate (WBC super bantamweight)
Wilfredo Gomez vs Juan Antonio Lopez (WBC super bantamweight)
Wilfredo Gomez vs Juan Meza (WBC super bantamweight)
Wilfredo Gomez vs Lupe Pintor (WBC super bantamweight)
Wilfredo Gomez vs Raul Tirado (WBC super bantamweight)
Wilfredo Gomez vs Roberto Rubaldino (WBC super bantamweight)