Rio is currently being trained by former British champion Richie Woodhall in a bid to get a licence ahead of a potential fight next year.
Rio, 39, revealed earlier this year that he was stepping into the ring to take part in a professional fight.
He added: “Rio’s a great lad and a boxing fan.
After overcoming out of the ring demons, Ricky has filled his life with training and promoting younger fighters, as well as a series of cheeky breakfast tweets.
But the former two-weight world champion has revealed that he could be tempted back into the ring to fight Rio Ferdinand.