The Nets had a chance to cut their magic number to one. But in a game Brooklyn desperately needed, the only magic they came up with was making a double-digit lead disappear.

Fighting to clinch a playoff berth, the Nets imploded down the stretch run of a 107-102 loss to Minnesota before a sellout crowd of 17,893 at Barclays Center.

And it could prove costly, with their lead for the sixth and final guaranteed playoff spot down to a single game.

Spencer Dinwiddie poured in a game-high 30 points and collected six assists.

But after the Nets had turned an 11-point third-quarter lead into a 105-102 deficit in the waning moments, he missed a pair of potential tying 3-point attempts.

Anthony Edwards — who led Minnesota with 23 points — blocked Dinwiddie with 8.7 seconds to play.

The Nets guard protested vehemently, but to no avail. He missed another look with 3.9 seconds left in regulation, and there would be no overtime.

But there would be much consternation with the refs.

Asked if watching the replay changed his opinion of whether the officials missed a call, Dinwiddie replied it hadn’t.

“Why would it change my opinion? He hit me on the elbow. You saw it,” Dinwiddie said. “The funny thing is I just did an interview and I said my two favorite refs were Kevin Cutler and [Zach] Zarba. That’s ironic isn’t it? That’s f–king hilarious. … They’re two good dudes, but they definitely missed one. Well several, actually. It’s a fact. We all saw the replays.

“Right hand to God, I literally just said they were my two favorite refs like two days ago when [a reporter] asked me for an anonymous poll; so it’s not so anonymous anymore. Again, I don’t change it. Like I said, they’re two good dudes. If I see them in the airport, it’s always love. KC’s from LA. But damn, they blew some. Jesus Christ. And it sucks because we’re fighting for a six seed. Nothing you can do but laugh about it now. Laughing to hide the pain.”

There will be a fair amount of that after this loss.

The Nets (43-36) had come in knowing they could clinch no worse than the sixth spot in the East with a win and a Miami loss.

But the Heat won in Detroit, where the Nets will now travel Wednesday night on the tail end of a back-to-back.

With three games left, they lead Miami by just one, though own the head-to-head tiebreaker.

Karl-Anthony Towns had 22 points, 14 rebounds and five assists to provide a great one-two punch with Edwards.

Meanwhile, Mikal Bridges had 24 points for the Nets, but had an uncharacteristically inefficient night, shooting just 9 of 24 overall and 1 of 5 from deep.

“They just executed better than us, they just got more stops than us, and credit to them,” Bridges said. “We’ve just got to finish the game better.”

The Nets dug themselves into a 31-24 hole after a first quarter that saw them shoot just 7 of 24.

Still trailing 41-36 after a Towns finger roll with 6:26 left in the half, the Nets’ defense sparked an 11-0 run.

A Dorian Finney-Smith 3-pointer capped the spurt and gave the Nets a 47-41 lead with 3:34 left in the half.

Leading by three at the break, the Nets scored eight unanswered coming out of the locker room. Bridges’ reverse gave them a 62-51 cushion.

But Brooklyn couldn’t protect it.

Taurean Prince, a former Net, drilled a left-wing 3-pointer to put Minnesota back in front 69-68 with 2:35 in the period.

The game went back and forth, and Dinwiddie knotted it at 100-all with 1:23 left, but missed a chance for an and-one.

That left it tied — until Towns broke the deadlock, and the Nets.

He got fouled and sank both free throws to put the Timberwolves back up 102-100 with a minute in regulation.

“I felt like it was a tough day for us offensively with the whistle. It’s just a couple of calls where — it’s more than a couple — where it was kind of goofy and just a surprising call,” Bridges said. “So it was weird. But I mean, how Spencer reacted it looked like he definitely fouled him.”