Hall of Famer and former multi-division world champion Julio Cesar Chavez, regarded by most as the greatest fighter to come out of Mexico, has for years heard criticism hurled in the direction of his sons, Omar and Julio Cesar Chavez Jr.

Both of his sons have had moments of success, but there were far more moments of letdowns.

Chavez Jr. was by far the more successful of the two sons - by capturing the WBC middleweight title and also taking part in numerous bouts where he earned millions of dollars.

Omar Chavez has never reached the heights of his older brother - with six defeats on his record, three of those losses in his last five fights to boxers who weren't world class contenders and he should have beaten them.

Chavez Jr. has four defeats on his record, but they all came at the hands of top level competition - like Canelo Alvarez, Daniel Jacobs, Sergio Martinez and Andrzej Fonfara.

His last bout, in December against Jacobs, left a bad taste in the mouths of many, after Chavez Jr. failed to make weight - a problem for him in the last few years - and he refused to continue fighting beyond the fifth round due to a nose injury. The local crowd in Arizona, mostly there to see Chavez Jr., went berserk and pelted the ring with various objects.

"It is very difficult [to hear these things about my sons], the truth is... for me it has been extremely complex and with social media now every critic has something to say to you," Chavez Sr. said.

"[My children] wanted this profession, I did not want it at first, I did not want them to be boxers because they had no need [to go in this direction] - but how are you going to deny a child that all of his life has seen his father boxing and wants to be the same as him.

"Logically there are comparisons [between the father and son] because they are never going to be equal.... children are sometimes better, sometimes they are not better. Unfortunately my children started out well [in the sport] but not with that discipline that it really takes to become someone big in boxing."