Celtics vs Heat Prediction, Odds, Best Bets & Team Props – NBA, May 21

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BetMGM Betting @BETMGM May 21, 2023, 5:30 PM
  • The Celtics are -3.5 favorites vs. the Heat
  • Total (Over/Under): 214.5 points
  • Sunday, May 21, 2023 at 8:30pm EDT
  • Watch the game on TNT

The Boston Celtics visit Kaseya Center to take on the Miami Heat on Sunday. Tipoff is scheduled for 8:30pm EDT in Miami.

The Celtics are betting favorites in this NBA playoff matchup, with the spread sitting at -4.5 (-110).

The Celtics vs Heat Over/Under is 214.5 total points for the game.

So far this NBA season, the Celtics are 53-43 against the spread, while the Heat are 42-53 against the spread.


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Celtics vs. Heat Odds, Over/Under & Moneyline

SpreadOver / UnderMoneyline
Boston Celtics-4.5 -110O 214.5 -110-185
Miami Heat +4.5 -110U 214.5 -110+150

Heat vs Celtics Prediction for Tonight’s Game:

Based on recent trends, the winning team model predicts the Celtics will win Sunday‘s game with 66.5% confidence.

Heat vs Celtics Spread Prediction:

Based on recent against-the-spread (ATS) trends, the model predicts the Celtics will cover the spread for Sunday‘s game with 58.2% confidence.

These predictions factor in up-to-date player injuries for both the Celtics and Heat, plus recent team & player performances and defensive & offensive matchups over the last several NBA games.


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  • The Boston Celtics have hit the 4Q Game Total Under in 66 of their last 100 games (+28.21 Units / 25% ROI)
  • The Boston Celtics have hit the 1H Moneyline in 33 of their last 44 games (+12.30 Units / 12% ROI)
  • The Boston Celtics have hit the 3Q Game Total Over in 58 of their last 100 games (+11.30 Units / 10% ROI)
  • The Boston Celtics have hit the Game Total Over in 26 of their last 42 games (+9.50 Units / 21% ROI)
  • The Boston Celtics have hit the 1H Game Total Under in 42 of their last 74 games (+9.25 Units / 11% ROI)
  • The Miami Heat have hit the Moneyline in 15 of their last 20 games (+22.55 Units / 64% ROI)
  • The Miami Heat have covered the 4Q Spread in 61 of their last 99 games (+19.52 Units / 18% ROI)
  • The Miami Heat have hit the 1Q Game Total Over in 30 of their last 43 games at home (+16.75 Units / 35% ROI)
  • The Miami Heat have hit the 2H Moneyline in 21 of their last 30 games (+14.32 Units / 36% ROI)
  • The Miami Heat have hit the Game Total Over in 21 of their last 30 games (+11.10 Units / 34% ROI)

Against the spread this NBA season, the Celtics have gone 53-43 (+5.7 Units / 5.35% ROI).

  • 65-32 against the Moneyline (-43.6 Units / -13.16% ROI)
  • 52-44 against the Over for game total points (+3.6 Units / 3.37% ROI)
  • 44-52 against the Under for game total points (-13.2 Units / -12.37% ROI)

Against the spread this NBA season, the Heat have gone 42-53 (-16.3 Units / -15.27% ROI).

  • 55-42 against the Moneyline (+3.95 Units / 2.19% ROI)
  • 50-46 against the Over for game total points (-0.6 Units / -0.56% ROI)
  • 46-50 against the Under for game total points (-9 Units / -8.43% ROI)
  • The Miami Heat have only hit the 1Q Game Total Under in 40 of their last 98 games (-22.80 Units / -21% ROI)
  • The Miami Heat have only hit the 2Q Game Total Over in 37 of their last 90 games (-21.87 Units / -21% ROI)
  • The Miami Heat have only hit the 4Q Game Total Over in 44 of their last 100 games (-18.80 Units / -17% ROI)
  • The Miami Heat have only covered the 1H Spread in 42 of their last 98 games (-18.75 Units / -17% ROI)
  • The Miami Heat have only hit the 1Q Moneyline in 35 of their last 78 games (-18.10 Units / -17% ROI)
  • The Boston Celtics have only hit the Moneyline in 44 of their last 71 games (-53.70 Units / -21% ROI)
  • The Boston Celtics have only hit the 4Q Game Total Over in 34 of their last 100 games (-40.57 Units / -36% ROI)
  • The Boston Celtics have only hit the 2H Moneyline in 50 of their last 96 games (-29.61 Units / -17% ROI)
  • The Boston Celtics have only hit the 3Q Game Total Under in 41 of their last 100 games (-24.57 Units / -22% ROI)
  • The Boston Celtics have only hit the 4Q Moneyline in 48 of their last 100 games (-22.82 Units / -17% ROI)

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Boston Celtics: Keys to the Game vs. the Miami Heat

The Celtics are 22-1 (.957) when shooting 50% or better from the field this season — best among NBA teams; League Avg: .733

The Celtics are 48-4 (.923) when shooting 40% or better from three since the start of the 2021-22 season — best among NBA teams; League Avg: .724

The Celtics are 39-16 (.709) when allowing fewer than 10 fastbreak points since the start of the 2021-22 season — 3rd best among NBA teams; League Avg: .568

The Celtics are 40-14 (.741) when scoring 15 or more second chance points since the start of the 2021-22 season — 3rd best among NBA teams; League Avg: .538

Miami Heat: Keys to the Game vs. the Boston Celtics

The Heat are 57-14 (.803) when shooting 40% or better from three since the start of the 2020-21 season — 6th best among NBA teams; League Avg: .721

The Heat are 93-51 (.646) when shooting 80% or better from the free throw line since the start of the 2020-21 season — 7th best among NBA teams; League Avg: .556

The Heat are 54-26 (.675) when scoring more second chance points than their opponent since the start of the 2021-22 season — 8th best among NBA teams; League Avg: .548

The Heat are 64-26 (.711) when allowing fewer than 10 fastbreak points since the start of the 2020-21 season — 2nd best among NBA teams; League Avg: .565

Injury Report: Heat vs. CelticsSunday‘s Game, May 21

  • Victor Oladipo (Heat): Oladipo suffered a torn patellar tendon in his left knee, according to Shams Charania of The Athetic.
  • Tyler Herro (Heat): Herro is expected to miss about 4-6 weeks, according to Chris Haynes of Turner Sports.
  • Danilo Gallinari (Celtics): Gallinari is still rehabbing his torn ACL with hopes of returning in the playoffs according to the Boston Herald.

Boston Celtics Offensive Stats & Trends

The Celtics have an assist to turnover ratio of 2.1 (1,087 assists/ 527 TOs) on the road this season — tied for best among NBA teams; League Avg: 1.8

The Celtics have made 16.0 three-pointers per game this season — 2nd best among NBA teams; League Avg: 12.3

The Celtics have made 14.9 three-pointers per game on the road since the start of the 2021-22 season — tied for best among NBA teams; League Avg: 12.2

The Celtics shot 38% from three (972/2,594) in the 2020-21 season — tied for 10th best among NBA teams; League Avg: 37%

Miami Heat Offensive Stats & Trends

The Heat have averaged 107.5 points per game (4,408 points/41 games) on the road this season — lowest among NBA teams; League Avg: 113.4

The Heat have averaged 52.5 points per game (4,308 points/82 games) in the second half this season — lowest among NBA teams; League Avg: 56.1

The Heat have averaged 109.5 points per game (8,977 points/82 games) this season — lowest among NBA teams; League Avg: 114.7

The Heat have averaged 42.8 points in the paint per game (3,508 points/82 games) on the road since the start of the 2021-22 season — 2nd lowest among NBA teams; League Avg: 48.4

Boston Celtics Defensive Stats & Trends

The Celtics have averaged 38.0 defensive rebounds per game (3,112 rebounds/82 games) this season — tied for 2nd best among NBA teams; League Avg: 35.2

The Celtics have averaged 7.0 steals per game (1,659 steals/236 games) since the start of the 2020-21 season — tied for 6th lowest among NBA teams; League Avg: 7.5

The Celtics have averaged 6.4 steals per game (521 steals/82 games) this season — tied for 3rd lowest among NBA teams; League Avg: 7.3

The Celtics have blocked 431 shots this season — 6th most among NBA teams

Miami Heat Defensive Stats & Trends

The Heat have averaged 3.0 blocks per game (243 blocks/82 games) this season — lowest among NBA teams; League Avg: 4.7

The Heat have averaged 3.1 blocks per game (508 blocks/164 games) since the start of the 2021-22 season — lowest among NBA teams; League Avg: 4.7

The Heat have averaged 3.4 blocks per game (794 blocks/236 games) since the start of the 2020-21 season — lowest among NBA teams; League Avg: 4.7

The Heat have averaged 3.4 blocks per game (400 blocks/118 games) at home since the start of the 2020-21 season — lowest among NBA teams; League Avg: 4.8


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Our BetMGM betting authors are experts who focus on individual game matchups & player prop bets with an emphasis on betting odds, lines & predictions.