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Tyson, 54, is set to face Jones Jr in an eight-round exhibition bout in California on September 12.
The former world heavyweight champion made a splash on social media when he uploaded clips of his training, but Foreman has questioned his approach.
He believes he has identified a shortcoming in his footwork in his training videos.
"He only see what he want to see. We are only looking at what he wants us to see," he told TMZ Sports.
"Maybe a few minutes later when he gets up out the bed he gets dizzy and falls on the floor or your leg pops out.
"That right leg that he was trying to throw, the right hand I noticed it didn't move with the right hand, it kind of stayed there. The left leg moved OK. I watch everything."
Foreman, 71, also revealed that his wife stopped him from making his own boxing comeback when he was 55.
"One time I told my wife I'm getting back into boxing. I was 55 years old, I was in shape and everything," he added. "I said 'now I can even pay the contender to fight me, £5million I can guarantee it and I can beat him I'm telling you.'
"She says 'you're not going to do anything like that' I said 'I'm telling you, you can't tell me what to do, do you not believe in me?'
"She said 'George, isn't that the way you want to leave the sport, believing that you can still do it.'
"That was closure there right away, and it was death to a fighter to realise you're never going to fight any more."
Featured Image Credit: Mike Tyson/YouTube
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