Manchester United's medical team are testing the club's stars twice a day for coronavirus during training, according to reports.
Club doctors at United's Carrington training ground are unwilling to take any risks with the virus continuing to spread.
As a result, the Mirror claim Ole Gunnar Solskjaer's men are tested when they arrive and leave the training ground.
United have no plans to close Carrington yet - despite Arsenal and Everton's training complexes being in complete lockdown.
However, United are taking precautions, with only essential first-team staff allowed to come into close contact with players.