Even, apparently, when he’s under verbal siege for a good part of the game.

Grande has been calling Celtics games since 2001, but he never faced a situation quite like what happened in Miami last Friday during the Celtics’ victory over the Heat in Game 3 of their first-round playoff series.

Grande, along with analyst Cedric Maxwell, called the game from their usual vantage point in Miami, 20-25 rows above courtside, the spot from which they’ve worked every Boston game at AmericanAirlines Arena the past four seasons. As is his custom there, Grande stood to get the best view of the court.

“I guess I could be taller,’’ he said yesterday, recalling the situation. “But whatever it takes to do the game. It’s never been a problem there before.’’

For the first half, it again was no problem. But when a group of latecomers arrived midway through the third quarter, the sideshow began. A female fan screamed at Grande to sit down because she couldn’t see the game, while one of her companions rattled off a stream of expletives.

At first, Grande, wearing headphones and in front of plexiglass, was unaware of the commotion. But that soon changed. The woman took up her case with security, to no avail, which only served to anger her further; according to a source who witnessed the situation, she made contact with Grande while talking to security. While Maxwell engaged the fans, Grande, who was told by an usher he could stay where he was, gave them no acknowledgment and never turned around.

The surreal scene concluded simultaneously with the game. Immediately after Paul Pierce’s buzzer-beater gave the Celtics the victory, the woman doused Grande with her beverage.

Just another night soaking in the high life of an NBA broadcaster?

“The joke is that [Celtics assistant coach] Tom Thibodeau had designed a defense against me,’’ said Grande, who was reluctant to discuss the incident in detail since it is now a matter of NBA security. “Fans yelling over there, behind me, security people trying to talk to me while I was on the air. It was a box-and-one. They were trying to defense me so I couldn’t call the game.’’

Yet Grande got through the broadcast with nary a hint of the chaos surrounding him. In retrospect, his performance was the epitome of professionalism.

“In some ways it was the greatest game I ever had,’’ he said. “I don’t know exactly what it sounded like. The only reason I was upset afterward. You can break a bottle over my head, but if the game didn’t come out right, that’s what would upset me.’’

Perhaps fortunately for Grande, there will be no more trips to Miami this postseason, with the Celtics having finished off the Heat in five games. Lethargic for many games in the second half of the season, the Celtics have apparently done what they implied they could do all along: play their best when the games mean the most.

“Max and I were talking about this on the postgame show after the Celtics clinched,’’ Grande said. “Which was that we all had skepticism in that idea and that the conventional wisdom is, ‘You can’t do that.’ Well, it looks like they’ve done it. How good a gauge Miami is, I don’t know, we’re about to find out with Cleveland. Like we said on the broadcast, the five games against Miami are maybe five of the best 10 games the Celtics have played since the first of the year. You could make that case. It’s different. It looks different, it feels different, and nobody really wanted to believe that if they were healthy and had days off between games that they would start looking good again.’’

The consensus among national media pundits is that the Celtics won’t look so good when confronted by their next opponent, the top-seeded Cavaliers, whom they will face in Game 1 of their Eastern Conference semifinal series tomorrow on TNT.

“The key is Rajon Rondo. He’s the wild card,’’ Grande said. “He’s the reason you have a puncher’s chance. [The Cavaliers] are the best team in the NBA, they have the best player [LeBron James], and they’ve got home court. So you’re starting with that against you. But you have the opportunity to dominate the point guard matchup. He has to dominate. It’s not fair, but Rondo is going to have to dominate Mo Williams in this series.’’