After a Chaotic Preseason, the Celtics Ask: Why Not Them?

BOSTON — The Celtics talked an awful lot in training camp about the value of experience. Last season, they got loads of it by surviving a brutal start, and by ousting intergalactic celebrities in the early rounds of the playoffs (Kevin Durant, Giannis Antetokounmpo) before advancing to the N.B.A. finals.

The process made them tougher and wiser, with a reservoir of resilience that may have equipped them to handle the news, essentially on the eve of camp last month, that their coach, Ime Udoka, had been suspended for the season for violating team policies. His sudden absence could have been disruptive.

Instead, the Celtics seemed to rededicate themselves to their singular goal of winning a championship. Why not them? Jayson Tatum and Jaylen Brown are two of the league’s brightest stars. The team’s supporting cast includes Marcus Smart, last season’s defensive player of the year. And if Joe Mazzulla, the team’s 34-year-old interim coach, is daunted by the task ahead of him, he hardly showed it Tuesday night as the Celtics opened their season with a 126-117 victory over the Philadelphia 76ers.

“These guys have been through a lot together,” said Mazzulla, whose players celebrated his first career N.B.A. coaching win by dousing him with water.

The last time the Celtics played a meaningful home game was back in June, when Golden State’s Stephen Curry gave them the business — yes, the business — in Game 6 of the N.B.A. finals. Curry left Boston with another championship, and Tatum and Brown were left to contemplate how they could take the next step.