BOS @ SAS
Boston Celtics · San Antonio Spurs · Sunday, 29 November 2026 at 22:00
UpcomingUpdatedAs of 24 Sept
What Forecast expects · Favourite
65%SASchance to win
SAS · 65.2%34.8% · BOS
- SAS starts with a 65.2% chance to win; BOS with 34.8%.
- In games: out of 10 like this one, SAS would win 7 and BOS 3.
Confidence
medium
- No game forecast has been checked against a result yet this season: confidence cannot be high until there are some.
- The model does not know this game's injuries or starting five.
Why
- Home court is worth 7.2 probability points to SAS.
- SAS's projected roster is stronger: 3rd in the league versus BOS's 9th. That moves 8.1 points toward SAS.
- Who carries SAS: Victor Wembanyama · De'Aaron Fox · Dylan Harper.
- SAS has 1,178 season minutes unassigned (6%); the model counts them at replacement level.
- Who carries BOS: Payton Pritchard · Jayson Tatum · Derrick White.
- BOS has 4,342 season minutes unassigned (22%); the model counts them at replacement level.
What weighs most
Home court+7.2 toward SAS
Projected roster+8.1 toward SAS
probability points
What could flip it
- Without Victor Wembanyama (SAS) the favorite would flip: the model would give BOS 52.2%.↔ BOS 52%
- Without Payton Pritchard (BOS), with his minutes at replacement level, the model would give SAS 70.0%.SAS 70%
- What the model does not look at and this number does not capture: rest and travel, the day's injury report, the starting five and recent form.
Uncertainty
- The model gives a number, not a band: its reliability is measured by comparing forecasts with results, not by drawing a margin.
- Over 10,749 games in 2017-2025 it did better than home court alone (Brier error 0.227 versus 0.247; 0 would be perfect).
- Rosters are not settled: the forecast is recomputed daily with that day's roster.
- It does not know injuries, rest, travel or the starting five: any of them can move this game without the number changing.
What changed since the last snapshot
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After the game
- Tips off on 2026-11-29. Afterwards, expected versus actual will be compared and recorded here.
Is it calibrated?
10,749
historical games
2017-2025
0.227
error (Brier)
home court only 0.247
- No forecasts have been settled this season yet: this model's calibration starts being measured with the first games (2026-10-20). Until then, its track record is historical: 10,749 games from 2017-2025.
How it is measured and limits
Model
SportiveWorld's game model, frozen before the season: it reads each roster's projected strength and home-court advantage. It does not read the day's injury report.
Data is up to date.
Sample · No settled games yet to measure it against.
Injuries · The model does not read the day's injury report: the rosters it uses are the season projections.
- · Rosters are not settled yet: the number can move until the season starts.
As of 24 Sept · SportiveWorld model
Verified against the source · 14/14
- ✓ expected competition and game
- ✓ home and away
- ✓ probability intact
- ✓ favourite = higher probability
- ✓ sealed and signed snapshot
- ✓ registered model
- ✓ sealed before tip-off
- ✓ consistent official result
- ✓ core verified by the server
- ✓ verified components
- ✓ numbers add up
- ✓ consistent scenarios
- ✓ freshness without contradiction
- ✓ consistent track record
This is reading the data, not a bet: we work with no bookmakers and show no odds. And a game turns on an injury, a hot night or a bad call.