The Phoenix Suns must like these nail-biters.

Maybe they’re working on becoming the NBA’s best fourth-quarter team after being the worst last season. They’re right now 13th in the league in fourth-quarter plus/minus, at plus one.

They’re stressing out their fans, but giving them what they ultimately want — victories, with the latest being a 115-112 win Wednesday over the Miami Heat before an elated, but emotionally spent sellout crowd of 17,071 at Footprint Center. The Suns extended their winning streak to six games.

Kevin Durant continued to deliver like an NBA MVP candidate in Year 18, scoring a game-high 32 points with the final two — a 21-footer over Haywood Highsmith — giving Phoenix a four-point lead with 16.8 seconds left.

Durant has five 30-point games already this season.

Devin Booker went for 22 points 9-of-17 shooting after going a combined 12-of-41 in his previous two games. He split two free throws with 4.8 seconds left, giving the Heat a chance to force overtime.

The Suns looked to foul but were unable to do so despite Booker’s efforts to foul Terry Rozier, but the Heat failed to get off a shot. Jimmy Butler scrambled out for a 3, but instead passed it to Tyler Herro, who was out of bounds and flung the ball up after time ran out.

Winners of six in a row, Phoenix (7-1) improved to 5-0 at home and 4-0 in games decided by four points or fewer while the Heat (3-4) are 1-3 in their past four games.

Suns big Jusuf Nurkic posted a double-double, 20 points and 18 rebounds, hitting 3-of-3 from deep. He came into the game 4-of-19 on 3s.

Herro paced the Heat with 28 points, going 5-of-9 on 3s, but he missed his last three from distance. Highsmith contributed 19 points off the bench while Butler added 15.

The Suns face the Dallas Mavericks for a second time this season Friday at American Airlines Center, at 5:30 p.m. Phoenix posted its largest margin of victory in its first matchup against the Mavs, 114-102, at home.

Here are three takeaways from Wednesday’s game.

Durant is something ‘to deal with’

Durant is having one of the special starts this season.

Call it coming off winning Olympic gold. Call it still being one of the best players in the world at age 36.

Call it playing in a system that enables him to find spacious driving lanes and open catch-and-shoot 3s to complement his already complete overall offensive game.

Whatever it is, one thing is certain. Durant is leading the Suns with his play on both ends and leadership, which is the main reason they’re looking like an early championship contender.

“That Kevin Durant is a (expletive) to deal with,” Booker said.

Durant just laughed when told what Booker said about him after the game, but he gave Booker and his teammates props, too, for spacing the floor because the defense must stay attached to them.

Durant delivered a game-winning layup Monday with 24 seconds left to complete Phoenix’s 118-116 comeback win over the Philadelphia 76ers, scoring 15 points in the fourth quarter.

Forty-eight hours later, Durant was at it again, scoring 11 in the fourth on 4-of-6 shooting.

By placing an even greater emphasis on shooting the 3, as evidenced by his season-high 11 (making four) Wednesday, Durant is forcing teams to defend him in even more space.

That’s a scary proposition for the defense, but he is also playing with a point guard, Tyus Jones, who can see him in the process of getting open — not when he’s open. Before then.

So that enables Durant to run the floor for a transition 3 knowing the ball will come his way even if it’s a crosscourt pass from Jones delivered on point.

Jones ended the night with nine assists to one turnover. Jones assisted on Durant’s final basket. Dig a bit deeper, 10 of Durant’s 32 points came off four Jones’ assists.

Durant is part of an offense that not only creates space for others, but creates space for him.

Halloween already has passed, but that’s an even scarier thought for teams trying to defend Phoenix.

3-ball for all

The Suns came into Wednesday’s game ninth in the NBA in 3-point shooting percentage at 37.7%, ninth in attempts at 39 a game and seventh in makes at 14.7.

They exceeded those numbers against Heat – 18-of-43 (41.9%) from 3.

Fast ball movement is one way to generate 40-plus 3s. With three guys who can play 1-on-1, Durant, Booker and Bradley Beal, the ball will stick from time to time.

However, teams that get extra possessions on traditional offensive rebounds or running down loose balls can create the wide-open 3. The Suns finished with 10 offensive rebounds.

Phoenix did that repeatedly on Wednesday. The Suns took a 93-92 lead in the fourth quarter when Royce O’Neale ran down a loose ball in the paint and kicked it out to an open Grayson Allen for 3.

They got an unexpected 3 booster from Nurkic, who hit one from Ahwatukee with the shot clock expiring in the fourth.

The Suns can’t consistently count on that from the big fella, but they came into the game with seven guys shooting between 46.5%(O’Neale) to 34.5% (Jones). They should remain in the top 10 with that much firepower and exceed those numbers like they did Wednesday night.

Fizdale keeping Bol engaged

Suns assistant David Fizdale and forward Bol Bol arrived in Phoenix together. They struck up a pretty good bond. Fizdale put in time working with Bol and should receive some credit for how Bol played when given an opportunity last season.

Frank Vogel never put Bol in the consistent rotation, saying the 7-footer with guard skills was good to play only in certain matchups. New head coach Mike Budenholzer, who, like everyone else, can see the talent in Bol, has yet to play him even one second through eight games this season.

“We have great depth and sometimes when you have great depth, some guys don’t play,” Budenholzer said last week.

The fans sure want him to play as they chanted his name during a recent home game.

Until Bol sees action, Fizdale is putting him through drills that are not only sharpening his skill set but also working on his conditioning and keeping him mentally engaged.

Bol has scary offensive skills for someone his height, but his defense has kept him on the bench.

With the way Phoenix is rolling now, it may be a while before Bol sees his first minutes this season. Until then, Fizdale is doing his part to see that Bol is ready when his name is called.