Gary Neville says behind closed doors games should only go ahead if there is a firm plan in place to control or disperse crowds gathering outside stadiums.
Clubs across Britain are hoping to conclude the current season within the next 12 weeks after the campaign was suspended as a result of coronavirus.
But the government's ban on public gatherings means matches would have to be played behind closed doors to avoid fans coming together en masse.
Paris Saint-Germain's recent Champions League clash with Borussia Dortmund was played in an empty stadium but fans still gathered in large numbers outside the Parc des Princes.