The Professional Game Board said more work needs to be done before Premiership rugby teams in England can start training.
Manchester United and Manchester City have different memories of FA Cup finals played on May 11.
Maro Itoje and Mako Vunipola have not committed to Saracens for next season, but John Mitchell is confident they will make the right call.
Billy Vunipola was among five Saracens players pictured breaking social-distancing rules this week.
Premiership champions Saracens, who will play in the second tier next season, will furlough staff and have asked players to defer wages.
A five-week break has been implemented in the Premiership, with the Champions Cup and Challenge Cup quarter-finals pushed back.
Exeter Chiefs have returned to the Premiership summit, while Wasps and Saracens also celebrated victories.
England overlook Mako Vunipola as a coronavirus precaution, yet he will play for Saracens against Leicester Tigers.
Mako Vunipola could play for Saracens this weekend, but England were advised not to take any risks following the prop's trip overseas.
Marland Yarde was in fine form as Sale Sharks went second in the Premiership table in style against Leicester Tigers.