Johnson, the tournament MVP, tied the score at 45 when he drilled a 3-pointer with 11:07 left in the game. That started a 16-6 run by the Wildcats that ended with 3:58 to play and Arizona comfortably ahead 61-51.
Johnson and Gordon scored five points apiece in the run.
"I was just trying to stay with it," Johnson said of his second-half performance. "I got into foul trouble early in the first half and it kind of got my rhythm a little down, but I just tried to stay with it.
"T.J. (McConnell) found me on a few plays and I just knocked down the shots."
"We talked all year about how we don't have a center," Duke coach Mike Krzyzewski said. "We have good players and we have to figure out how to be good with the players we have.
"We're not going to win unless Jabari (Parker) and Rodney (Hood) shoot the ball. They (Arizona) have taller guys and if you do get the ball around the basket they're 6-9 or 6-10, that's a big front line.
"We don't practice against that. Two things you can't practice against is length and quickness. We have quickness, but not length."
"He (Gordon) stayed patient," Miller said, "which is one of the qualities that he has as player. I chose not to play him a lot in the first half because he was in foul trouble, but we as a group have to find more ways to use his offensive talent even more.
"He's such a unique player. You can put him in different positions and he can really excel. You would think that someone 6-8 would not be good in a ball-screen and pick-and-roll action, but he's very good in that."
NOTES: Duke defeated Arizona 82-72 in the 2001 national championship game. In the next and most recent meeting, the Wildcats won 93-77 in the regional semifinals of the 2011 NCAA tournament. ... The Blue Devils played in their 220th straight game as a top-10 team in the AP poll. Duke is 182-37 (.831) during that span. ... Arizona PG J.T. McConnell owns a 3-to-1 assist-to-turnover ratio. ... Arizona sophomore C Kaleb Tarczewski posted his first career double-double with 15 points and 10 rebounds in the semifinal win over Drexel. ... Duke PG Quinn Cook leads the ACC in assists (7.2) and assist-to-turnover ratio (5.4 to 1).