Pep Guardiola's advice helped the Boston Celtics win the NBA Finals, so says Joe Mazzulla.

The Celtics clinched the NBA title with a 106-88 victory over the Dallas Mavericks in Game 5 on Monday.

That sealed a 4-1 series win for Boston, who won their 18th Championship, and first since 2008.

And head coach Mazzulla revealed that Manchester City manager Guardiola, who was in attendance for Game 1 of the Finals, played a part in his team's success.

"Dallas has one of the smartest defenses," Mazzulla said.

"We had to be creative to counter them."

"Pep helped me in transitions and how to move guys."

Perhaps when he does eventually leave City, Guardiola might just try his hand in the NBA?