The Celtics are one win from clinching the 18th title in franchise history, and Payton Pritchard made sure he infused the game with his signature shot.

With time running out before the first half expired in Game 5 of the NBA Finals on Monday night at TD Garden, Pritchard collected a pass from Al Horford and launched a 43-foot shot from behind the half-court line to give Boston a 67-46 lead over the Dallas Mavericks.

Several NBA players gave the Celtics guard his flowers.

Pritchard entered Game 5 for Derrick White with four seconds remaining in the second quarter and immediately made an impact with his only shot of the game.

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