Well this is a awful way to tip off the 2017 National Basketball Association season.
His first season with the Celtics likely ended in less than 6 minutes, the TNT reporters soon confirmed that it was a fractured left ankle. Hayward had his leg wrapped in an air cast as he exited the arena. Boston made it to the Eastern Conference Finals last season, losing to the Cleveland Cavaliers in five games.
Numerous players giving their support have suffered dramatic injuries themselves, including Paul George and Houston Texans star defensive end J.J. Watt. Hayward's ankle appeared to dangle in the highlights indicating this is a major injury.
Hopefully Hayward makes as speedy of a recovery as possible.
Players on both the Celtics and the Cavaliers, as well as the fans, looked deeply concerned.
But those storylines faded fast in the face of Hayward's injury.
Without Hayward, who signed a four-year, $128 million contract in July, the Celtics could have a tough time pushing the Cavaliers in a seven-game series.
Hayward helped lead the Utah Jazz to one of their most successful seasons this decade.