The WTA Tour, ATP Tour and the International Tennis Federation have extended the ban on competitive tennis until July 31.
In effect, all outdoor summer tournaments in Europe have been called off.
Play is tentatively due to return on August 1, while organisers of the US Open are still planning with their original start date of August 31.
ATP Tour events in Hamburg, Bastad, Newport, Los Cabos, Gstaad, Umag, Atlanta and Kitzbühel have all been cancelled.
While July's scheduled stops at Bastad, Lausanne, Bucharest, and Jurmala on the WTA Tour will also be shelved.
The COVID-19 pandemic has seen Wimbledon cancelled for the first time since World War II, and the French Open at Roland-Garros pushed back to late-September.
A WTA spokesperson said, "We regret this is the case but will continue to be guided by medical experts for when it is safe and possible to return to WTA competition.
"We continue to monitor the situation closely and are hopeful to be back on the court as soon as possible.
"A decision regarding the dates in which Karlsruhe and Palermo may be played along with further updates to the WTA calendar will be made in June."
Similarly, the ATP are hoping to provide a more positive update in mid-June.
ATP chairman Andrea Gaudenzi added, "Just like tennis fans, players and tournament hosts all over the world, we share in the disappointment the Tour continues to be affected in this way.
"We continue to assess all of our options in an effort to resume the Tour as soon as it is safe to do so, including the feasibility of rescheduling events later in the season.
"As ever, the health and well-being of the tennis community and wider public remains our top priority in every decision we make."
The next tournament on both the ATP and WTA calendars is the Citi Open in Washington DC which is due to get underway on August 3.
