INDEPENDECE, Ohio — LeBron James is a meticulous dresser on and off the court, so his fashion choice on Tuesday was no accident.

He had worn the sleeveless T-shirt before in practice, but the black cutoff with the picture of a gold-and-green leprechaun throwing a punch had deeper meaning this time: The Celtics are next.

James will renew his personal rivalry with the NBA’s most storied franchise on Wednesday as the Cavaliers, who have been waiting for an opponent since May 7, open the Eastern Conference finals in Boston. This will be the sixth time James has faced the Celtics in the postseason, and his history with them has run from great to forgettable.

So while the T-shirt was for his alma mater, Akron’s St. Vincent-St. Mary High School, it was also a nod to the Celtics, the team James has played in the postseason more than any other.

And it was a not-so-subtle jab. Remember, this is the same guy who came home from California last June wearing an “Ultimate Warrior” T-shirt after the Cavaliers shocked Golden State to end Cleveland’s half-century title drought.

“They’re a worthy opponent,” said James, who didn’t have much to say about the Celtics or anything else after the Cavs concluded their final practice during a lengthy layoff. “We have to game plan every game. We have to game plan for what they bring to the table. And we have to mentally focus on our challenges that we have every game.”

No team in the East gets James’ attention more quickly than the Celtics, who survived an exhausting, seven-game series against Washington to make their first conference final since 2012.

James is aiming for his seventh trip to the NBA finals – a streak shared only by Bill Russell and other members of those famed Celtics teams in the ’60s – and he’ll have to go through Boston again to get there. The last time he lost before the finals was in 2010 to the Celtics.

On the way to the locker room following that Game 6 loss, he yanked off his Cavs jersey for what many thought was the last time. Two months later, James took his talents to South Beach.

Two years later, he returned to Boston, scored 45 points in Game 7 of the conference finals and led the Miami Heat to the first of two straight titles.