BOSTON — Boston Celtics coach Brad Stevens says Gordon Hayward is expected to make a full recovery from the gruesome injury he sustained in the team’s opener.

They just don’t know how long it will take yet.

Stevens told reporters before the Celtics’ home opener against Milwaukee that Hayward has a dislocated ankle and broken tibia. He is expected to have surgery soon, Stevens says he isn’t sure if Hayward will be able to return this season.

Hayward signed a four-year, $128 million contract with the Celtics.