Reds boss Jurgen Klopp had wanted his players to be given the all-clear before heading back to their Melwood HQ.
And at the club’s training ground, groups of three who have tested negative have been training, although each one had a pitch to themselves.
Only half of the club’s first team have returned, though more are expected in the next few days.
Manchester United’s stars will all have tests ahead of returning to training on Monday week.