Both five-time Ballon d’Or winners were eliminated from this year’s edition of the FIFA showpiece event yesterday.
Messi and Argentina succumbed 4-3 to France in a thrilling encounter during which they led 2-1 at one stage.
Despite failing to get on the scoresheet, the Barcelona star laid on two assists, one each for Sergio Aguero and Gabriel Mercado.
Ronaldo meanwhile put in a subdued performance as the European Champions winners were knocked out by Uruguay.
But Neville thinks the World Cup would be a lesser spectacle without Messi and Ronaldo.
"From Messi’s point of view, maybe that’s it," former England international Neville told ITV Sport.
"Can they retire? The whole weight of the nation is on their shoulders.
“It's a shame we might not see Messi and Ronaldo at the next World Cup because they have been such incredible players."
