With the start of the MLS Is Back tournament slated to kick off at ESPN’s Wide World of Sports on July 8, Major League Soccer commissioner Don Garber said Wednesday he doesn’t know when season proper will resume this summer.

“I expect we will be back in our cities; we just don’t know the exact date,” said Garber said on a conference Wednesday afternoon. Garber added he was “very optimistic the team will play at home sometime this year.

It could take as much as a month before MLS decides on when it will resume league play.

More than anything, the players’ health is the utmost importance. Players and club staff will live in the same hotels and cannot have any contact with the public.

The league will conduct regular virus testing and temperature checks. If an individual tests positive, he would have to enter isolation to be monitored. Contact tracing also would be started for infected individuals.

At this moment, Garber said there was no exact number of positive tests among players and team staffs that would mean the tournament would be canceled.

Because the games are in the heart of summer in Central Florida, the game times will be a bit unusual for east coast matches.

Matches will begin at 9 a.m., 8 p.m. and 10:30 p.m. (all ET), although many, if not most contest will take place at night. Thanks to an emergency international rule change this summer by FIFA, teams can five substitutions instead of the usual three. Match rosters will have up to 23 players instead of 18.

The games will be played behind closed doors, although media will be allowed to cover the matches in person.

The league will announce full TV information soon. ESPN will carry the final.

The league will conduct a draw Thursday at 3:30 p.m. ET to determine the first-round groups. There will be uneven divisions. The Eastern Conference will include one six-team group and two four-team groups. The Western Conference will have three four-team groups.

The three group games will count against the team’s regular season record.