Mitchell Robinson Reflects on Disappointing Celtics Debut

• Mitchell Robinson was unhappy with his performance in his debut with the Celtics.
• Robinson mentioned the team's previous loss and his role as a big player.
• Coach Joe Mazzulla emphasizes Payton Pritchard's key role in the team's success.
• The Celtics face the challenge of filling the production gap left by Jaylen Brown's departure.
• Payton Pritchard is expected to play a crucial role in supporting Jayson Tatum.