Up to 50 Premier League players are planning to revolt against plans to restart the season, according to reports.
A source from one club told The Mirror "two or three" players from every team have major reservations about getting the top flight season back under way in June.
Though nothing is set in stone under Project Restart, a number of clubs are back in isolated training with a view to stepping up to full contact sessions later in May.
It is hoped the Premier League will then return to action on June 12, with the remaining 92 fixtures completed by the end of June, but several players are quietly worried about the plan.
Manchester City striker Sergio Aguero and Brighton's Glenn Murray are among those to have spoken out, while other are said to harbour concerns about young babies and vulnerable family members.
Sheffield United manager Chris Wilder and Manchester United boss Ole Gunnar Solskjaer have both said they would understand players not wanting to play, with the latter insisting no-one will be forced into a return against their will.
Dean Smith has also raised the possibility of two Aston Villa players sitting out of the remainder of the campaign over health fears.
Brighton chief executive Paul Barber said: "The players have a number of questions to ask about safety. We have got to be able to answer those questions. We have a player whose partner has a serious medical condition - if he refuses to play we need to know where we stand."
