Chelsea have asked their players to return to the United Kingdom by May 3 with the Premier League stepping up plans to complete the season from June 8.
Christian Pulisic is currently in his hometown of Hershey, Pennsylvania in the United States, and he is among a group who will need to return by Sunday which also includes Willian and Emerson, who are both in Brazil.
It is understood that Chelsea will be flexible with any player who suffer travel disruptions due to the coronavirus outbreak.
The UK has enforced a policy on people returning to the country to take a 14 day Isolation.
Members of the Premier league will fund the COVID-19 testing to be done on players 48 hours before returning to training.