No professional tennis tournaments will be played anywhere in the world until at least 20 April.
The ATP Tour has postponed all play for six weeks because of "escalating health and safety issues" arising from the coronavirus outbreak.
All tournaments on the men's ATP Tour and ATP Challenger Tour have been cancelled until 27 April.
No WTA tournaments will be staged for at least five weeks, either, with ITF events also on hold until 20 April.
"This is not a decision that was taken lightly," said the ATP chairman
Andrea Gaudenzi added: "It represents a great loss for our tournaments, players, and fans worldwide.