Matchday 8 · Premier League 2015-16 · October 3, 2015
Chelsea 1–3 Southampton: who deserved to win?
Southampton beat Chelsea 3–1, and the replays back it up: with the way both teams played, Southampton win 7 of 10, 2 end level. Southampton made the better chances: 1.7 expected goals to 0.4.
Full time
| Team | Goals | xG |
|---|---|---|
 Chelsea | 1 | 0.43 |
 Southampton | 3 | 1.67 |
Replay with same day's form
Luck index +19 Southampton about even · −19 Chelsea
Each team’s own shots from this match, resampled into new matches 4,000 times, each a goal at its expected-goals chance: with the way both teams actually played, how often does this performance win? How the replay works
Ten replays. Chelsea win 1, 2 end level, Southampton win 7.
- 1 CHE 1 SOU 0
- 2 CHE 1 SOU 1
- 3 CHE 2 SOU 2
- 4 CHE 0 SOU 4
- 5 CHE 0 SOU 3
- 6 CHE 0 SOU 2
- 7 CHE 0 SOU 2
- 8 CHE 1 SOU 2
- 9 CHE 0 SOU 1
- 10 CHE 0 SOU 1
The narrowest view of luck
The same match, with only the coin flips re-rolled: every shot kept where and how it was taken, its outcome redrawn at its chance (75% of finishing counts as luck), own goals at the league’s rate.
Only coin-flips re-rolled
There is no betting line for this match, and no forecast from before kickoff: matches of past seasons are replayed, not forecast.
How 4,000 replays of the 90 minutes ended
Chelsea win 8%, 21% end level, Southampton win 71%. The line is what actually happened: Southampton by 2.
Show as a table
| After 90 minutes in the replays | Share of replays |
|---|---|
| Chelsea by 3+ | 0.1% |
| Chelsea by 2 | 1.1% |
| Chelsea by 1 | 7.0% |
| Draw | 20.9% |
| Southampton by 1 | 28.1% |
| Southampton by 2 | 22.3% |
| Southampton by 3+ | 20.5% |
Where the luck was
| Finishing | Shots | Goals | Expected goals | Above expected |
|---|---|---|---|---|
 Chelsea | 11 | 1 | 0.43 | +0.57 |
 Southampton | 14 | 3 | 1.67 | +1.33 |
Own goals aren’t shots, so they’re counted on their own. A side above expected finished better than its chances, or met a goalkeeper on a bad day; 75% of the gap counts as luck (why that share).
The big chances, and every goal
| Minute | Chance | xG |
|---|---|---|
| 9' | Willian Borges da Silva scored from a free kick | 0.01 |
| 42' | Steven Davis scored from a shot | 0.08 |
| 48' | Sadio Mané didn’t score from a shot | 0.42 |
| 59' | Sadio Mané scored from a shot | 0.22 |
| 71' | Graziano Pellè scored from a shot | 0.09 |
When it happened
Chelsea’s chance of winning
As low as 0% and as high as 85%. Numbers mark the biggest luck moments, listed below.
| # | When | What happened | Win probability for |
|---|---|---|---|
| 1 | 9' | Willian Borges da Silva scored from a free kickFinishing · 1% chance | +22% CHE |
| 2 | 40' | Ryan Bertrand didn’t score from a shotFinishing · 20% chance | +5% CHE |
| 3 | 42' | Steven Davis scored from a shotFinishing · 8% chance | +26% SOU |
| 4 | 47' | Willian Borges da Silva didn’t score from a free kickFinishing · 6% chance | +2% SOU |
| 5 | 48' | Sadio Mané didn’t score from a shotFinishing · 42% chance | +14% CHE |
| 6 | 48' | Sadio Mané didn’t score from a shotFinishing · 18% chance | +6% CHE |
| 7 | 59' | The game turned hereSadio Mané scored from a shotFinishing · 22% chance | +28% SOU |
| 8 | 71' | Graziano Pellè scored from a shotFinishing · 9% chance | +10% SOU |
Adjust the assumptions
Think finishing is more skill than we do? Change how much of it counts as luck and the coin-flip replay of the 90 minutes reruns in your browser.
Only coin-flips re-rolled
Chelsea 3% · draw 7% · Southampton 90%
- Final margin
- Southampton by 2
- Luck in goals
- 0.6 for Southampton
- Luck-adjusted margin
- Southampton by 1.4
- Replay with same day's form
- Chelsea 8% · draw 21% · Southampton 71% unchanged: why
About these numbers
Expected goals per shot from StatsBomb’s open data; the replays, the in-game win probability and the luck shares are our own models, fitted and tested on every shot of four full league seasons and four tournaments, these matches included (methodology and validation). Southampton win 81% of replays (a draw counted as half).
All matchday 8 matches, 2015-16 · Chelsea · Southampton
More from matchday 8, 2015-16
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