The first world heavyweight champion in the history of Mexican boxing, Andy Ruiz, underwent a successful surgery on his right knee on Tuesday in Guadalajara, Jalisco.

Ruiz's handlers are hoping that he can fight again in the month of December.

Ruiz, 31-years-old and having a professional record with 34-2 and 22 knockouts, was looking to return in the month of October. But, Ruiz finally made the decision to undergo the surgery that had been postponed for years.

“They operated on his right knee, he had been struggling with that knee for about three years, he could not run very much, he could not do certain movements, he used gel and things like that to mitigate the pain, but recently it was not enough and he made the decision of the operation that was an arthroscopy and it was done by the same doctor who operated on Canelo, Pedro Lomeli," said Andy Ruiz Sr. in a conversation with ESPN Deportes.

With less than five months to go until the end of the year, Andy's father was asked if the agenda would be to set his sights on 2022; However, he said that both the doctor and the physical trainer believe that they could still do a second fight this year.

Ruiz snapped a long stint of inactivity with a decision win over Chris Arreola in May.

“They gave us hope that he would come back in December. The physical trainer, the doctor told us that, if everything goes well right now, then that possibility exists, but we will see when the moment arrives. Right now we are happy that the surgery went well," said Andy's father.

Ruiz was heavyweight world champion from June 2019 to December of that same year, when he stopped Anthony Joshua in one of the biggest upsets in the history of this sport, but then he was outboxed over twelve rounds in the rematch.

Earlier this year, Ruiz hired Eddy Reynoso as his new head trainer.