Heavyweight legend Mike Tyson wants Deontay Wilder to return to the ring as soon as possible but said he needs to use his jab more if he is to return to the top.
The youngest champion in the division's history believes Wilder has much more to give despite back-to-back defeats against Tyson Fury.
The "Bronze Bomber" got stopped in round 11 of their trilogy battle in October and is now weighing up his options.
Tyson analysed where Wilder went wrong during his fight with Fury but also hopes to see him back in the ring.
"Going with your jab, he has to go all out for 12 rounds with him," Tyson told host Shannon Sharpe. "You can't give him no room to punch.
"Deontay Wilder has to go all out for 12-rounds with him. He can't give him any time by moving around. He can't allow him to think.
"Wilder allows Tyson Fury to think a lot. He gives him a lot of time."
However, the "Baddest Man of the Planet" wants Wilder to return to the ring.
"I don't want Deontay to get discouraged. He should be ready to fight someone else right away."
Both men are former world champions although Ruiz made just one defence, losing his three titles to Joshua in their 2020 rematch.
Wilder and Ruiz are under Al Haymon's Premier Boxing Champions banner so it would be easy to make and more importantly, the winner will be in line for a potential world title fight.
Wilder or Ruiz will have to wait until 2023 though with the winner of Fury-Whyte and Usyk-Joshua expected to meet to determine the first undisputed champion since 1999.