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Napoli vs Sampdoria — Serie A 2018

Napoli
Napoli
FT
1 – 0
HT: 1 – 0
Sampdoria
Sampdoria
1/9/2022Serie ASerie A · Round 21Stadio Diego Armando Maradona

Match Prediction

Statistical Prediction

Based on goals from last 94+ matches

Napoli57%
×Draw23%
Sampdoria21%
✓ Correct in 50 of 100 matches — 5 more than always backing the home side
Model
50%
Always home
44.6%

The model picks a winner (home or away) for each finished match using only pre-kickoff data, then checks it against the real result: 50% correct across 579,794 matches, vs 44.6% for always backing the home side.

Home picks 50.2% correct · Away picks 49.2% 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
1.86
Sampdoria
1.02

Napoli creates 82% more chances

Season form · 140 home / 94 away

creates per match

Napoli
1.92
Sampdoria
1.10

allows per match

Napoli
0.94
Sampdoria
1.81

finishing

Napoli+0.00on par
Sampdoria+0.00on par

Total goals

55%Over
  • Over55
  • Under45

3+ goals likely

Both teams score

54%Yes
  • Yes54
  • No46

Both teams likely to score

Score probability

Probability of each scoreline, %

Napoli ↓

Sampdoria →
0
1
2
3
4
0
0–06%
0–16%
0–23%
0–31%
0–40%
1
1–010%
1–111%
1–25%
1–32%
1–40%
2
2–010%
2–110%
2–25%
2–32%
2–40%
3
3–06%
3–16%
3–23%
3–31%
3–40%
4
4–03%
4–13%
4–21%
4–30%
4–40%

Most likely 1–1 (11%) · grid covers 96% of scorelines

More markets

Total goals

OverUnder0.5
94%6%1.5
78%22%2.5
55%45%3.5
32%68%4.5
16%84%

Double chance

Napoli or draw
79%
Napoli or Sampdoria
77%
Draw or Sampdoria
43%

Winning margin

Napoli wins by 2+
33%
Sampdoria wins by 2+
7%

Team goals

Napoli 1+ goals
84%
Napoli 2+ goals
55%
Napoli 3+ goals
28%
Sampdoria 1+ goals
64%
Sampdoria 2+ goals
27%
Sampdoria 3+ goals
8%

Draw no bet

Napoli (draw refunded)
74%
Sampdoria (draw refunded)
26%

Combos

Both score & 3+ goals
43%
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

Sampdoria away — creates 1.10, concedes 1.81 · 94 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 + Sampdoria defence 1.81 → ÷2 → 1.86

Sampdoria attack 1.10 + Napoli defence 0.94 → ÷2 → 1.02

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 57%?"

Napoli scores more
57%
level
23%
Sampdoria scores more
21%

Napoli at 57% 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 57% 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 Sampdoria

Napoli beat Sampdoria 1-0 in Serie A on January 9, 2022.

The match was played at Stadio Diego Armando Maradona in Napoli.