Gordon Hayward has been taken out of the Celtics' season opener against the Cavaliers with what appears to be a serious leg injury.

Hayward jumped up in an effort to catch a pass from a teammate when he came down on his ankle. He came down badly. His leg was then put in an air cast and he was taken off the court on a stretcher.

LeBron gives Gordon Hayward some words of encouragement following his injury. pic.twitter.com/VW4HDDoP2k

— Bleacher Report (@BleacherReport) October 18, 2017

Hayward was picked up in free agency this offseason by the Celtics. He signed a 4-year, $127 million contract. Hayward had two points and a rebound at the time of his injury.

The Celtics have not announced the diagnosis yet of the injury.