Pittsburgh Steelers head coach Mike Tomlin believes it is only fair to re-open NFL facilities at the same time amid the coronavirus pandemic.

The NFL has laid out a plan for all 32 teams to have their facilities prepared to be re-opened by Friday, May 15.

Commissioner Roger Goodell sent a memo to all teams on Wednesday, informing them of the protocols put in place to have their complexes ready to open, and will then advise them as to when they can formally allow personnel to enter.

The first phase allows 50 per cent of non-player personnel permitted in the facility and only players continuing their rehab and therapy that they began before facilities were ordered to close in late March. The second phase involves increasing the number of staff members and players.

Tomlin spoke to reporters via a conference call on Saturday and said: "I prescribe to the approach of competitive fairness within our game, and that is everybody gets an opportunity.

"Our game is extremely competitive. It's one of the things that make football at this level so attractive to our fans.

"I'm committed to preserving and protecting that, and so all teams getting an opportunity to start on the same footing is a core element of that."

Tomlin added: "There's a couple of things that we're committed to adhering to, and that's the global approach of the National Football League in regards to football ops and how important competitive fairness is in our game.

"We all got to get started on the same footing in that regard. Then, also, respecting our local government and the guidelines they prescribe individually in terms of workplace safety.

"Those are the two key components for us. We're in a wait-and-see mindset, and we'll be ready to go when both boxes are checked."