“Get knocked down, get back up. Get knocked down, get back up.”

This is the phrase that former Boston guard and fan-favorite Isaiah Thomas repeated in the Celtics’ preseason hype video released Tuesday.

The Celtics host the Philadelphia 76ers in their season opener Wednesday night, as they look to continue their 11-year playoff streak.

Thomas, who played in Boston from Feb. 2015 through 2017, is still loved in Boston. His most notable season came in 2016-17, when he averaged 28.9 points per game on his way to coming fifth in MVP voting.

The 36-year-old returned to provide energy and excitement in the video before the season got underway:

“The outside noise? The predictions? Go ahead and count us out. We’ve been there before,” Thomas said .

The predictions that Thomas referenced

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