| Season | League | Apps | Min | Goals | Assists | G+A / 90 | Rating |
|---|---|---|---|---|---|---|---|
| 2018/2019 | Pro League | 1 | 2 | 0 | 0 | — | — |
| 2019/2020 | Pro League | 3 | 51 | 0 | 0 | — | — |
| 2020/2021 | Pro League | 9 | 584 | 0 | 0 | 0 | 6.96 |
| 2021/2022 | Pro League | 32 | 1890 | 2 | 1 | 0.14 | 6.87 |
| 2022/2023 | Pro League | 36 | 2876 | 1 | 5 | 0.19 | 7.17 |
| 2023/2024 | Pro League | 5 | 381 | 0 | 0 | 0 | 7.28 |
| 2023/2024 | Bundesliga | 29 | 1367 | 2 | 1 | 0.2 | 6.9 |
| 2024/2025 | Pro League | 20 | 1792 | 0 | 0 | 0 | 7.21 |
| 2024/2025 | Bundesliga | 9 | 68 | 0 | 0 | — | 6.71 |
| 2025/2026 | Bundesliga | 16 | 1254 | 1 | 2 | 0.22 | 6.97 |
Domestic league competitions only (SportMonks sub_type='domestic'); national-team, continental and cup competitions are excluded. Classification resolved by league id against the canonical leagues index. G+A/90 computed from minutes actually played.
Figures computed from the GioScore season-stats database · as of 2026-07-24
Player stats against each opponent club
| Team | MP | W | D | L | G | A | ||
|---|---|---|---|---|---|---|---|---|
 Gent | 11 | 3 | 2 | 6 | 0 | 0 | 4 | 1 |
 Anderlecht | 11 | 1 | 3 | 7 | 1 | 0 | 4 | 0 |
 Genk | 9 | 1 | 3 | 5 | 1 | 0 | 1 | 0 |
 Standard Liège | 8 | 2 | 4 | 2 | 0 | 0 | 2 | 0 |
 OH Leuven | 8 | 3 | 3 | 2 | 0 | 0 | 3 | 0 |
 Sporting Charleroi | 7 | 2 | 0 | 5 | 0 | 0 | 1 | 0 |
 K. Beerschot V.A. | 7 | 4 | 2 | 1 | 1 | 0 | 1 | 0 |
 KV Oostende | 7 | 2 | 2 | 3 | 1 | 0 | 1 | 0 |
 Mechelen | 7 | 1 | 3 | 3 | 0 | 0 | 3 | 1 |
 Union Saint-Gilloise | 7 | 1 | 1 | 5 | 0 | 0 | 1 | 0 |
 Club Brugge | 6 | 2 | 3 | 1 | 0 | 0 | 4 | 0 |
 Sint-Truiden | 6 | 4 | 1 | 1 | 0 | 0 | 2 | 0 |
 KV Kortrijk | 6 | 4 | 1 | 1 | 0 | 1 | 1 | 0 |
 Zulte-Waregem | 5 | 3 | 0 | 2 | 0 | 0 | 1 | 0 |
 KAS Eupen | 5 | 2 | 1 | 2 | 0 | 0 | 0 | 0 |
 Antwerp | 4 | 0 | 1 | 3 | 0 | 0 | 0 | 0 |
 Westerlo | 4 | 3 | 0 | 1 | 0 | 1 | 1 | 0 |
 Eintracht Frankfurt | 4 | 0 | 3 | 1 | 0 | 0 | 0 | 0 |
 VfL Wolfsburg | 4 | 2 | 1 | 1 | 0 | 0 | 1 | 0 |
 Borussia Mönchengladbach | 4 | 0 | 3 | 1 | 0 | 0 | 0 | 0 |
Player stats against each opponent national team
| Team | MP | W | D | L | G | A | ||
|---|---|---|---|---|---|---|---|---|
 Azerbaijan | 2 | 2 | 0 | 0 | 0 | 0 | 0 | 0 |
 Sweden | 1 | 0 | 1 | 0 | 0 | 0 | 0 | 0 |
 Austria | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 |
 England | 1 | 0 | 1 | 0 | 0 | 0 | 0 | 0 |
 Republic of Ireland | 1 | 0 | 1 | 0 | 0 | 0 | 0 | 0 |
 Estonia | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 |
 Serbia | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 |
 Portugal U21 | 1 | 0 | 0 | 1 | 0 | 0 | 0 | 0 |
 Czech Republic U21 | 1 | 0 | 1 | 0 | 0 | 0 | 0 | 0 |
 Netherlands U21 | 1 | 0 | 1 | 0 | 0 | 0 | 0 | 0 |
 France U21 | 1 | 0 | 1 | 0 | 0 | 0 | 0 | 0 |
 Georgia U21 | 1 | 0 | 1 | 0 | 0 | 0 | 0 | 0 |
 Japan U22 | 1 | 0 | 0 | 1 | 0 | 0 | 0 | 0 |
In the 2025/2026 Bundesliga, Olivier Deman made 16 appearances (1,254 minutes), with 1 goal and 2 assists — 0.22 goal involvements per 90. GioScore's computed rating for the season averages 6.97.
At his best he averaged 7.28 in 2023/2024, Pro League; at his worst, 6.71 in 2024/2025. The direction of late is downward — 0.23 under his prior average over the last two rated seasons.
