Call it a lack of respect from certain members of the Raptors, an overwhelming desire to make good on a sub-par performance five days earlier or a kick in the butt from his head coach, Kevin Garnett was a man on a mission Friday night.

After Andrea Bargnani dropped 29 points on the Celtics last Sunday in a 102-101 come-from-behind Raptors win in Toronto, Celtics coach Doc Rivers pulled Garnett aside and essentially told him that can’t happen again. Garnett responded by scoring a season-high 26 points while holding Bargnani to 11 in Garnett’s best two-way game of the season as the Celtics prevailed, 110-101, Friday nigh at TD Garden.

“Doc has different ways of motivating me,” Garnett said. “He pulled me to the side, he wasn’t really happy with Bargnani situation up there and I wasn’t really pleased with that, either. And tonight was more of a concentrated effort to just make sure I kept him under control. It doesn’t take much to motivate me.”

Rivers was far more subtle in his post-game comments but hinted that he saw the KG everyone expected on Friday night.

“Kevin’s energy tonight was off the charts, and you knew it would be, if you know Kevin,” Rivers said. “Because the last time we played them, the guy in his position had a pretty good game, and that’s just Kevin Garnett.”

Then there were the words of Shaquille O’Neal, who hinted that Raptors forward Amir Johnson was talking trash and directing it at KG on the court. Pretty dumb idea, if true.

Garnett said he was inspired by his own fire and Rivers’ words of inspiration.

“It was 50-50 a little bit,” Garnett added. “I didn’t get much sleep [Thursday] night. That’s what it is. I’m going to see Bargnani as long as I’m in the league but I guess the way Doc came at me was the way he wanted it. That’s what he wanted. I likes to see me a little of the chain at times and I don’t mind being like that.”