Cavaliers forward Kevin Love is in the NBA concussion protocol and will miss Game 7 Sunday night against the Celtics on Sunday night at TD Garden.

The winner Sunday night advances to the NBA Finals. 

Love, the Cavs' second-leading scorer behind LeBron James and their leading rebounder, collided with Celtics rookie forward Jayson Tatum and they bumped heads when the Cavs were on offense in the first quarter of Boston's 113-103 loss in Game 6 of the Eastern Conference Finals on Friday night in Cleveland.

Love was down on the court for a few minutes, walked off the floor with help, but didn't return.

Tatum was shaken up, stayed in the game and said "I'm fine" afterward.