Watch: Isaiah Thomas cries pregame before leading Celtics out of tunnel
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Isaiah Thomas is understandably emotional.
Just a day after finding out his younger sister Chyna was killed in a car crash, the Boston Celtics point guard was crying by himself before Sunday's first-round opener against the Chicago Bulls.
Not long after, the 28-year-old All-Star led his teammates out of the players' tunnel for the tilt, in which he's set to play.
Here's more heartbreaking footage of Thomas ahead of the matchup: