Tyson Fury is attempting to secure the best sparring partners possible, to help him prepare for the upcoming rematch with WBC heavyweight champion Deontay Wilder.
The second contest takes place on February 22, at the MGM Grand in Las Vegas. They fought to controversial draw in December 2018 at the Staples Center in Los Angeles.
Riakporhe, who's career is guided by top heavyweight Dillian Whyte, is healing a broken hand and won't be able to make the trip to Fury's camp in Las Vegas.
"They called me to spar but, because of my hand, I couldn't. It would have been an experience," Riakporhe said to Sky Sports.
On the other hand, Riakporhe believes Fury will beat Wilder when they meet again.
"I'm leaning to Fury - he will be more serious and disciplined. All that showboating means he switches off, and that's how he was put down. If he was serious and conducted himself properly in that fight, he would be the world champion by now," Riakporhe said.
EBU cruiserweight champion Lawrence Okolie, who is represented by unified heavyweight champion Anthony Joshua, had assisted Fury when he was preparing for the first contest with Wilder. At the moment he's yet to commit to the current camp.
"It was a learning experience that we both gained from. I must have done something right for them to want me back again," Okolie said.
Ironically, Riakporhe is pushing hard to get Okolie in the ring. Okolie aims to finalize a deal for a world title fight against former champion Krzysztof Glowacki.
Riakporhe hopes to get his hands on Okolie in the not too distant future.
"I'm fine with fighters winning. I'm cool with that. Against me, you're an obstacle. You're not winning, you're going down," Riakporhe said.