Head coach Brad Stevens provided an update Sunday, per the team's Twitter account:
Boston Celtics @celtics
Stevens believes Isaiah Thomas' intention is to play, but comments, "He's struggling." Coach is encouraging IT to do what's right for him.2017-4-16 20:47:38
Thomas would end up starting the game and honored his sister with his shoes:
Bleacher Report @BleacherReport
Isaiah Thomas honors his late sister. https://t.co/8kf2FnuWbV2017-4-16 22:57:10
Thomas' sister, Chyna Thomas, was killed in a single-car accident Saturday.
The crash took place in Washington, but Thomas has remained with the team in Boston.
The Celtics hosted the Chicago Bulls in Game 1 of a best-of-seven first-round playoff series Sunday evening.
Thomas ranked third in the NBA during the regular season with 28.9 points per game and also led Boston in assists with 5.9 per game.