Tyson, 53, fought two epic bouts with Holyfield, 57, during their professional careers, including their controversial 1997 encounter in which Tyson bit off a chunk of Holyfield’s ear.
After Mike Tyson, former heavyweight champion Evander Holyfield teases fans by releasing training video
Holyfield had announced his return to the ring for a charity bout on Instagram last week.
Ruiz Jr, who will be bidding to become Mexico's first heavyweight world champion, replaces Joshua's scheduled opponent Jarrell Miller, who was barred from fighting after failing drugs tests
'Slumdog' Mike Tyson says the 'poorer you are, the better boxer you can become' on first trip to India
Former boxing champion Mike Tyson declared himself a "slumdog" Friday as he made his first trip to India.
Boris Becker bankrupt: From Diego Maradona to Chris Cairns, list of sportsmen who went down the same route
Boris Becker joined a long list of athletes who fell from dizzying heights of fortune to file for bankruptcy due to a myriad of reasons from mismanagement of finances to child support.
Former world champion L Sarita Devi will make her professional debut against Zsofia Bedo of Hungary in the Indian Boxing Council's 29 January fight night to be held in her home town of Imphal.
Romney, 68, and Holyfield, 52, sparred, if you could call it that, for just two short rounds during a charity fight on Friday night.
Mary Kom, a Khel Ratna awardee, is currently taking a break from the ring after giving birth to her third child earlier this year.