United's unbeaten run ended with a 2-0 Champions League defeat to PSG and Neville declared the second-leg would be a dead rubber.
But Schmeichel, who won the treble with Neville, was furious with the Englishman's analysis.
“I don't know why he said that," the Dane replied.
“There's a three-week period now and anything can happen before the second leg.
“Make no mistake about it, Manchester United will have learned a lot.
“In three weeks you can improve a lot, train a lot and come up with a proper plan."
And the 55-year-old suggested the current manager's experience in the tournament can help his side.
Schmeichel continued: “If anyone has taken part in creating miracles with that football club, [Solskjaer's] one of them.
“Thomas Tuchel said it correctly – if we can win 2-0 away from home, they can win 2-0 away from home."