Even though Messi and Ronaldo have dominated the FIFA World Player of the Year award in recent years, Ferguson believes all that could change in the near future.
However, Ferguson admitted that Neymar still has some way to go before he can join Messi and Ronaldo in football's elite players club.
"The boy Neymar gets a lot of publicity about the potential he's got, but I think that's still to be seen, still to be fulfilled," Ferguson told ESPNFC. "Certainly, most people I speak to speak highly of the boy.
"When I had Anderson at United, he spoke volumes about the boy's ability. So hopefully he'll be the next one who'll produce the type of talent we see in Messi and Ronaldo.
"You'll always look at clubs like Bayern Munich, Barcelona, Real Madrid and Manchester United to produce that kind of player you're talking about, but to be honest, I'm not sure there's one sticking out at the moment."
Meanwhile, Ferguson also admitted that he stepped down as United manager after nearly 27 years due to a decline in his energy levels.
"When I came to United in my early 40s everyone saw the energy, but when you get older you're the only one that recognises or knows the kind of energy you've got left," he said. "I had to re-align myself when I got in to my 60s in terms of putting it in and the sleep I needed to maintain my energy until the very end because people expect to see the same energy all the time.
"That's the problem when you're leading a group of people all the time."