Al Horford said that the Boston Celtics needed to change their mindset after losing Kristaps Porzingis to injury during their convincing Game 4 102-88 victory over the Miami Heat.

The Celtics now have a 3-1 series lead after Derrick White scored a career-high 38 points to edge the top seeds one step closer to the Conference Semifinals.

The win came at a cost though, as Porzingis was forced off with right calf tightness just before the end of the second quarter, but the Celtics rallied to win their sixth straight game in Miami.

Horford replaced Porzingis for the second half and told ESPN that the team had to change their approach after losing a key player.

“All of us, our mindset has to shift," he said.

“I talked to Luke [Kornet] and Xavier [Tillman] and let them know that all of us have to be ready to step up and do a little more because KP was playing so well defensively.

“It’s definitely concerning for me. He's in good spirits, but we don't know what it's going to be. I'm just hoping that it's nothing serious, and he can get back to us quick.”

Bam Adebayo finished with 25 points, 17 rebounds and five assists for Miami, but they struggled on offence once more, with Tyler Herro scoring 19 points and Caleb Martin adding 18.

The Heat coach, Erik Spoelstra, bemoaned his side’s struggles to get more points on the board, saying: “Offensively, we struggled again. We had some decent looks early on, weren't able to knock those down, and Derrick White was very good tonight — obviously. He was just very efficient, very good.

“I know in my heart we have a game that's there. It's just a matter of the ball going in a few more times, and all of a sudden it ignites.”