NBA finals: Celtics rout Mavericks in Game 1 win as Porziņģis returns in style

• Six Celtics reach double figures as Boston rout Dallas
• Porziis scores 20 off bench in first game in 38 days
• Dallas Mavericks 89-107 Boston Celtics - as it happened

Jaylen Brown scored 22 points, Kristaps Porziis added 20 in his first game in more than a month and the Boston Celtics powered past the Dallas Mavericks 107-89 on Thursday night in Game 1 of the NBA finals.

Derrick White finished with 15 points for Boston, which led by 29 points in the first half and connected on 16 three-pointers in a powerful start to its quest for an 18th NBA title.