Manchester United have told players who have been based abroad during the coronavirus outbreak to return to the UK this week.
The move comes as Premier League clubs look at options to return to training grounds later this month under the Project Restart proposal, which has led to concerns being raised from four Premier League club doctors.
United are yet to set a date for when training for Ole Gunnar Solskjaer's side will resume at their base at Carrington.
Bruno Fernandes, Fred, Victor Lindelof and Sergio Romero were among the players given permission to leave England in March after consultation with the club.
The Premier League is hopeful of resuming the current campaign in June - potentially at neutral venues behind closed doors - but the proposals are yet to receive approval from the government.
Some Premier League clubs have returned to socially distant training last month with others waiting on the government's next lockdown restriction review which is due on May 10.
United are fifth in the Premier League table, three points behind fourth-placed Chelsea, with nine games remaining.
Which Premier League clubs have returned to training?
Some Premier League teams have returned to training grounds while players of other teams are still in self-isolation.
Premier League restart: The challenges ahead
This is 'a significant week for the future of football in this country', according to Sky Sports' latest podcast.
In an in-depth preview, Sky Sports News' chief reporter Bryan Swanson and reporter Kaveh Solhekol explain where Project Restart - the plan to resume football in England - is up to, what needs to happen before football can return and the hurdles which must still be overcome.
Read an edited version of their explainer or listen to their analysis in full on a special Sky Sports Football podcast.