Booker had 31 points, six assists and five rebounds and Paul had 23 points and eight assists as the Suns’ guards once again outplayed the Bucks’ backcourt.
Game 3 is Sunday in Milwaukee (8 p.m., ABC).
Phoenix shot 8-of-14 on 3-pointers in the first quarter, scoring 24 of their 26 points from deep. Booker, Mikal Bridges and Jae Crowder each had two, and Cam Johnson and Torrey Craig each had one.