Messi's World Cup got off to the worst possible start when he missed a penalty in Argentina's opening game, which ended in a disappointing 1-1 draw with tournament debutants Iceland. "We have great players, a fantastic group".
But Neville thinks the World Cup would be a lesser spectacle without Messi and Ronaldo.
Ronaldo said - in comments published in the Daily Mail - that Portugal, the European champions, had "played better than Uruguay".
Javier Mascherano, at 34, showed a lot of heart in the middle of the Argentina midfield at the Fifa World Cup in Russian Federation, but quite often it was painfully clear this was a level that was too much for him, considering his legs were pretty much gone for the grand worldwide stage.
'But it's those who score more goals who win.
Such are the high standards they have set over the past decade, that Messi and Ronaldo might think, "If we can't be at our best, then it might not be worth it". So now, the question is, for how much longer will we even see these two superstars in their national team shirts? "It is a really well-run tournament and the organisation has been really positive".
Messi- arguably world best- was shown the exit door from Russian Federation on Saturday following his team's 4-3 defeat by France.
"Now it's not the time to talk about the future", Ronaldo said.
Lionel Messi's disappointments with Argentina "I hope that all the lads who follow in my footsteps can achieve what they are aiming for. There are no more illusions for me", Mascherano told Argentina's TyC sports channel.
Mascherano, who left Barcelona for China in January, retires from Argentina duty after winning 147 caps for his country, scoring three goals.