BOSTON —

The Boston Celtics are gearing up to open their season at home against the Philadelphia 76ers, with notable changes to their lineup and key players facing injuries.

Boston's roster is set to look very different, as Jayson Tatum remains sidelined due to an Achilles injury, and the team parted ways with Al Horford, Luke Kornet and Kristaps Porzingis during the offseason. Jaylen Brown is listed as questionable for Wednesday's game because of a hamstring strain, although he said he's feeling great.

"Couldn't ask for a better preseason up until today and now we go into a season where there's ever-flowing changes, challenges and opportunities and we have to fight to keep that identity on both ends of the floor," said head coach Joe Mazzulla at Tuesday's practice at the Auerbach Cente

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