Three weeks ago, it was all about the sizzle for the Miami Heat, during a week that included victories over the Chicago Bulls, Brooklyn Nets and Philadelphia 76ers, with a one-point loss to the Milwaukee Bucks.

Life was good perched atop the NBA East.

Now it’s all about the fizzle, with the Heat falling 100-95 Saturday night to the Nets at FTX Arena, to complete an 0-4 week, in danger of soon teetering to the conference’s No. 4 seed.

With coach Erik Spoelstra away from the team because of a medical procedure for one of his two young sons, assistant coach Chris Quinn was charged with righting a ship that was lilting after losses to the 76ers, Golden State Warriors and New York Knicks, with all three of those teams without leading men.

Instead, more of a the same, with an offense simply unable to keep pace with what the Nets were offering with Kevin Durant and Kyrie Irving, especially when committing 19 turnovers over the first three quarters.

“I think it was pretty overall,” Quinn said of the thoroughness of Saturday night’s failure, “certainly not to our identity.”

So make it 0-3 on this four-game homestand that ends with a Monday game against the Sacramento Kings, then grueling road challenges to follow against the Boston Celtics, Bulls and Toronto Raptors.

“I think we’re at the point where we’re not concerned at the point of panicking,” Heat point guard Kyle Lowry said, “but, yeah, we need to fix some stuff.”

Durant led the surging Nets with 23 points, with Irving need for merely 11 points, six assists and four rebounds, both sitting out the fourth quarter. With Nets center Andre Drummond going for 13 points and 11 rebounds, the Nets essentially put it away by halftime, when their lead stood at 21, growing to 37 in the third period.

For the Heat, who fell to second place in the East, there were 14 points from Bam Adebayo, 12 from Lowry and just seven from Jimmy Butler, all pulled before the end of a third quarter that ended with the Heat down 96-68.

“It certainly hasn’t been our best week,” Quinn said, “but we’re no excuses out here.”

Five Degrees of Heat from Saturday’s game:

1. Herro, Oladipo back: Tyler Herro was back after missing the previous two games due to knee soreness, an absence that came in the wake of 5-of-15 shooting in Monday night’s road loss to the 76ers.

Although uneven from distance (0 for 5 on 3-pointers), he showed arguably as much spark as anyone in Heat colors (which, on this night, wasn’t saying much).

Herro closed with 13 points on 5-of-14 shooting, four rebounds and three assists.

“There’s holes in the offense that we can figure out as a group, as a team, and we’ll figure it out,” Herro said.

Also back was guard Victor Oladipo, who had missed Friday night’s loss to the Knicks due to back spasms.

Lacking explosion and athleticism, it is starting to look as if Oladipo will not be a panacea, limited with his play off the dribble.

Oladipo finished with nine points on 3-of-9 shooting, with six assists and three rebounds.

2. Robinson struggles: The good games continue to be the exception with Duncan Robinson, this time scoreless on 0-for-3 shooting on 3-pointers a night after he closed 2 of 7 from beyond the arc.

The upshot was that on a night the Heat needed to keep pace from beyond the arc, they closed the first half at 3 of 17 on 3-pointers and finished 10 of 34.

The 3-point shooting was yet another element that has gone south.

“It’s disappointing,” Herro said. “At this time of the year we want to be playing our best basketball.”

3. On the outs: Just a week earlier considered a playoff option at backup center, and then recast as a potential scoring boost off the bench at power forward, Markieff Morris did not get off the bench Saturday.

“Markieff is a great leader in our locker room,” Quinn said, “but we’re trying to figure out what’s best for the team going forward.”

While the back-to-back scheduling in the wake of Friday’s loss to the Knicks was a factor, the Heat priority appears to be getting Caleb Martin back up to speed.

Also shuffled down the mix was forward Max Strus, who did not enter for the first time until 4:46 remained in the third period.

4. Dragic honored: Former Heat guard Goran Dragic, now with the Nets, was honored with a video tribute during the game’s first timeout.

The extended tribute was more typical of those the Heat offer for players who previously won championships with the team, showing the abiding respect for the veteran point guard.

Dragic, who offered a hearty wave to the crowd after the tribute, closed with six points on 1-of-4 shooting and four assists in 21:12.

5. No Spo: Spoelstra missed the game due to a medical procedure for one of his two young sons.

It was the third time he missed a game since taking over as coach in 2008-09, both previously for the births of his sons.

Both previous games without Spoelstra came on the road, a 113-107 loss on March 25, 2018 in Indiana, for the birth of Santiago, and then 112-93 on Dec. 4, 2019 in Boston, for the birth of Dante.

Both of those games were coached by former assistant Dan Craig, who now is an assistant coach with the Los Angeles Clippers.

“Quinny came in with a great attitude, great spirit,” Lowry said.

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