Philadelphia 76ers coach Doc Rivers did little to disguise his irritation after Dwight Howard was ejected on his return to the Staples Center.

Howard and fellow former Los Angeles Laker Danny Green were presented with their 2020 championship rings before Thursday's encounter, which the Sixers won 109-101.

That was little thanks to Howard, who was dismissed by referee Jane Fitzgerald between the first and second quarters after intentionally walking into the Lakers' Montrezl Harrell.

Howard and Harrell had already been called for double technical fouls and the former's punishment as the altercation resumed meant an automatic disqualification

"Clowns. Guys just joking around. It's ridiculous on both parts. I didn't like, it, bottom line," Rivers said in an immediate reaction on the court and victory over the slumping Lakers did not soften his view too much.

"I just thought it was a very selfish play," he said, per ESPN.

"You got one tech, you can't get another one. We just have to have better discipline.

"I get it. I know there's a lot of emotion. But we had one center on our team, and he got thrown out.

"I was not very happy with that one. I know it's an emotional game. But he's a veteran. We got to have better discipline."

Harrell joined the Lakers in the immediate aftermath of Howard's surprise switch to Philadelphia.

Although the source of their bad blood remains unclear, Harrell was unrepentant afterwards, having theatrically waved Howard off the court as he remonstrated with Fitzgerald.

"I'm not backing down from nobody, man. I don't take that lightly. I don't take none of that disrespect," he said.

"You're not gonna push me all around the court and just feel like you're gonna big-boy me and just attack me or whatever.

"It's not in my blood, it will never be in my blood. I don't care what nobody feels about it, I don't care who don't like me. It is what it is."