Carmelo Anthony and Kevin Garnett jawed from baseline to midcourt, and Anthony still had more to say.
So the Knicks forward went toward the Celtics locker room after the game to keep shouting, taking his frustrations from the court right along with him.
Paul Pierce scored 23 points, and Boston beat host New York 102-96 on Monday night in a heated first meeting of the season between the Atlantic Division rivals.
Anthony left without talking to reporters, and the Knicks wouldn't comment on Anthony's postgame trip in the wrong direction.
MSG Network reported the incident, in which security had to step in and send Anthony back in the right direction, as it went to its postgame show, and the league likely will investigate and might penalize the Knicks' leading scorer and reigning Eastern Conference player of the week.
Comcast SportsNet New England posted a video on its website showing Anthony waiting near the Celtics' team bus after the game, with coach Mike Woodson and New York City police nearby.
"I didn't know what was going on at that point in time," Knicks forward Amare Stoudemire said.
Garnett added 19 points and 10 rebounds for the Celtics, who even without the suspended Rajon Rondo won their third straight. Rondo was suspended Monday for making contact with a referee in a game against Atlanta on Saturday and failure to cooperate with an NBA investigation.
Anthony had 20 points but shot 6 of 26 while
Garnett denied the postgame altercation. "Listen, heat of the battle, man. Guys go back and forth," he said.
J.R. Smith led the Knicks with 24 points.
Wizards 101, Thunder 99: Bradley Beal made a jumper with 0.3 seconds left, lifting short-handed Washington over visiting Oklahoma City, which missed 16 straight shots at one stretch.
The Wizards (5-28) played without their top two scorers, Nene (right knee tendinitis) and Jordan Crawford (sore left ankle). With John Wall, Trevor Booker and Cartier Martin also out, Washington had just nine players available.
Hornets 95, Spurs 88: Eric Gordon scored six straight points in a key fourth-quarter spurt and had 24 overall to lead host New Orleans over San Antonio. Manu Ginobili scored 21 points to lead the Spurs, who had won eight of their previous nine.
Grizzlies 113, Kings 81: Wayne Ellington scored a season-high 26 points, hitting six 3-pointers, to help Memphis rout host Sacramento.
Zach Randolph scored 17 points and had seven rebounds for the Grizzlies, who outscored the Kings 36-20 in the third quarter to blow open the game.
DeMarcus Cousins had 10 points and eight rebounds for the Kings. In the previous four games, he had averaged 24.5 points and 15.2 rebounds. Tyreke Evans returned to the Kings after missing the previous 11 games with a sore left knee. He had five points in 12 minutes.
Trail Blazers 125, Magic 119: LaMarcus Aldridge had 27 points and 10 rebounds, and host Portland handed Orlando its ninth straight loss.
Jazz 100, Mavericks 94: Gordon Hayward scored a season-high 27 points, including four 3-pointers, and Utah defeated Dallas in Salt Lake City.
Bucks: A person with knowledge of the decision tells The Associated Press that Scott Skiles is out as Milwaukee's coach.
The decision to part ways came Monday, two days after the Bucks lost their fourth straight game to fall to 16-16 on the season. USA Today first reported the move.
Skiles was 162-182 and in his fifth season with the Bucks. A hard-nosed, defensive-minded coach, Skiles sometimes had difficulty meshing with a roster that was built around scoring guards Brandon Jennings and Monta Ellis.
Lakers: Dwight Howard, Pau Gasol and Jordan Hill all will miss Los Angeles' upcoming trip with injuries, leaving the struggling club without its top three big men indefinitely. Howard has a torn labrum in his right shoulder, Gasol has a concussion, and Hill has a right hip injury.
Pacers: Indiana has signed coach Frank Vogel to a contract extension. Terms were not disclosed.
Timberwolves: Minnesota forward Kevin Love met with doctors in the Twin Cities to evaluate his right hand, which is broken for the second time this season.