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Napoli vs Spal — Serie A 2018

Napoli
Napoli
FT
1 – 0
HT: 1 – 0
Spal
Spal
12/22/2018Serie ASerie A · Round 17Stadio San Paolo

Match Prediction

Statistical Prediction

Based on goals from last 38+ matches

Napoli59%
×Draw23%
Spal19%
✓ Correct in 50 of 100 matches — 6 more than always backing the home side
Model
49.7%
Always home
44.3%

The model picks a winner (home or away) for each finished match using only pre-kickoff data, then checks it against the real result: 49.7% correct across 106,786 matches, vs 44.3% for always backing the home side.

Home picks 50.7% correct · Away picks 47.3% correct

Football matches only. Past performance is not indicative of future results.

Expected goals in this match

What is xG?

Every shot is scored 0–1 by how likely it is to be a goal from that spot — a chance in the middle of the box ≈ 0.4, a long shot from a tight angle ≈ 0.03, a penalty ≈ 0.76. Add them up over a match and that is the xG.

The scoreline can lie: you can win 1-0 on a fluke while creating half the chances. xG shows who was really closer to scoring — and over a season it predicts results better than goals alone.

Napoli
1.84
Spal
0.93

Napoli creates 98% more chances

Season form · 140 home / 38 away

creates per match

Napoli
1.92
Spal
0.92

allows per match

Napoli
0.94
Spal
1.76

finishing

Napoli+0.00on par
Spal+0.00on par

Total goals

52%Over
  • Over52
  • Under48

Close call

Both teams score

51%Yes
  • Yes51
  • No49

Close call

Score probability

Probability of each scoreline, %

Napoli ↓

Spal →
0
1
2
3
4
0
0–06%
0–16%
0–23%
0–31%
0–40%
1
1–012%
1–111%
1–25%
1–32%
1–40%
2
2–011%
2–110%
2–25%
2–31%
2–40%
3
3–07%
3–16%
3–23%
3–31%
3–40%
4
4–03%
4–13%
4–21%
4–30%
4–40%

Most likely 1–0 (12%) · grid covers 96% of scorelines

More markets

Total goals

OverUnder0.5
94%6%1.5
76%24%2.5
52%48%3.5
30%70%4.5
15%85%

Double chance

Napoli or draw
81%
Napoli or Spal
77%
Draw or Spal
41%

Winning margin

Napoli wins by 2+
34%
Spal wins by 2+
6%

Team goals

Napoli 1+ goals
84%
Napoli 2+ goals
55%
Napoli 3+ goals
28%
Spal 1+ goals
61%
Spal 2+ goals
24%
Spal 3+ goals
7%

Draw no bet

Napoli (draw refunded)
76%
Spal (draw refunded)
24%

Combos

Both score & 3+ goals
40%
Both score & under 3
11%

Model probabilities, not odds. For information only.

How is this calculated?

Every number below comes from this match — nothing is made up.

1

Recent form of each side

Napoli at home — creates 1.92, concedes 0.94 · 140 matches

Spal away — creates 0.92, concedes 1.76 · 38 matches

⚑ Home and away form are counted separately — the home-field edge is already baked into these numbers.

2

Expected goals for this match

Napoli attack 1.92 + Spal defence 1.76 → ÷2 → 1.84

Spal attack 0.92 + Napoli defence 0.94 → ÷2 → 0.93

Each side's attack is blended with the other's defence, then averaged.

3

Chance of every scoreline

From those two numbers a Poisson distribution gives the probability of each exact score — the grid shown above.

4

The answer to "why 59%?"

Napoli scores more
59%
level
23%
Spal scores more
19%

Napoli at 59% is simply the biggest of the three — that is the pick.

What the model can't see

It reads only the stats of recent matches. It knows nothing about:

  • injuries & suspensions
  • the matchday lineup
  • motivation — cup, relegation, a title race
  • weather & pitch condition
  • in-game coaching decisions

So 59% does not mean "Napoli will win" — it means "on the available stats, this is the most likely result."

Statistical model based on expected goals (xG). For informational purposes only.

Probable lineups not yet announced

Starting lineups are usually confirmed ~1 hour before kickoff

Serie A: Napoli 1–0 Spal

Napoli beat Spal 1-0 in Serie A on December 22, 2018.

The match was played at Stadio San Paolo in Naples.