Alvarez was , and still is , an unknown in the eyes of many .
Alvarez genuinely gave a really tough test to unified Flyweight champion Juan Francisco Estrada ( 31 - 2 , 22 ) in a bout much , much more competitive than the score cards suggest .
Alvarez was , and still is , an unknown in the eyes of many but he genuinely gave a really tough test to unified Flyweight champion Juan Francisco Estrada ( 31 - 2 , 22 ) in a bout much , much more competitive than the score cards suggest .