Tottenham captain Hugo Lloris fears for injuries if players return to match action too soon when the season resumes.
Tottenham's French World Cup-winning goalkeeper claims footballers are like Formula One cars and need time to get up to full speed.
Prem and EFL chiefs are targeting behind-closed-doors games starting in early June after the coronavirus suspension.
But Lloris, 33, insisted: “The sportsman is a machine comparable in some ways to an F1 car — everything is fine-tuned.
“You have to pay attention when you restart the engine.
“When we do restart, athletes will need time to get back into shape for the final sprint.
“At the moment we're just keeping in shape — but we're very far away from our top physical condition."
In an interview with Le Parisien, Lloris added: “If we finish the season behind closed doors, it won't be the same sport, but we will manage.
“Sport will still have its place. It has this ability to bring people together.
“As footballers, we have greater responsibility. There will be a tomorrow but the psychological impact will be stronger on some people.
“And I imagine it will be a fairly long transition period before things get back to normal."