BOSTON (AP)---Isaiah Thomas took the floor to a deafening cheer for the Boston Celtics' playoff opener against the Chicago Bulls on Sunday night, just a day after his sister was killed in a car accident.

It was part of an emotional night for All-Star point guard who had 33-point, six assists and five rebounds in a 106-102 Game 1 loss to the Bulls.

The Celtics held a pregame moment of silence for Chyna Thomas, who died early Saturday in a one-car interstate accident in their home state of Washington. She was 22. Thomas was informed of her death following the team's practice Saturday afternoon.

It was unclear if he'd play Sunday, and prior to the game TNT's cameras captured teammate Avery Bradley comforting Thomas on the bench during the pregame shootaround. But Thomas led the team out of the tunnel when Boston took the floor for pregame warmups. He looked toward the rafters just before the tip-off.

On his shoes were written several messages, including "Chyna," ''RIP Lil Sis" and "I love you."

Thomas did not address the media afterward, but his teammates said emotion tailed him throughout the day.