| MasterChief vs King | 49–39 | 55.68% |
| MasterChief vs Kazuya | 52–34 | 60.47% |
| MasterChief vs Jin | 50–30 | 62.50% |
| MasterChief vs Law | 28–33 | 45.90% |
| MasterChief vs Hwoarang | 35–24 | 59.32% |
| MasterChief vs Dragunov | 30–21 | 58.82% |
| MasterChief vs Bryan | 31–17 | 64.58% |
| MasterChief vs Steve | 21–21 | 50.00% |
| MasterChief vs Devil Jin | 29–12 | 70.73% |
| MasterChief vs Reina | 24–16 | 60.00% |
| MasterChief vs Eddy | 21–16 | 56.76% |
| MasterChief vs Nina | 21–13 | 61.76% |
| MasterChief vs Yoshimitsu | 19–13 | 59.38% |
| MasterChief vs Xiaoyu | 14–11 | 56.00% |
| MasterChief vs Alisa | 9–16 | 36.00% |
| MasterChief vs Azucena | 15–9 | 62.50% |
| MasterChief vs Lili | 13–10 | 56.52% |
| MasterChief vs Asuka | 17–5 | 77.27% |
| MasterChief vs Lars | 10–12 | 45.45% |
| MasterChief vs Claudio | 16–6 | 72.73% |
| MasterChief vs Victor | 14–8 | 63.64% |
| MasterChief vs Paul | 8–13 | 38.10% |
| MasterChief vs Feng | 10–10 | 50.00% |
| MasterChief vs Lee | 7–12 | 36.84% |
| MasterChief vs Lidia | 8–7 | 53.33% |
| MasterChief vs Kuma | 2–12 | 14.29% |
| MasterChief vs Jun | 9–5 | 64.29% |
| MasterChief vs Heihachi | 7–5 | 58.33% |
| MasterChief vs Leroy | 5–5 | 50.00% |
| MasterChief vs Raven | 4–3 | 57.14% |
| MasterChief vs Jack-8 | 4–1 | 80.00% |
| MasterChief vs Leo | 2–2 | 50.00% |
| MasterChief vs Shaheen | 3–0 | 100.00% |
| MasterChief vs Panda | 2–1 | 66.67% |
| MasterChief vs Anna | 1–2 | 33.33% |
| MasterChief vs Fahkumram | 2–1 | 66.67% |
| MasterChief vs Zafina | 1–1 | 50.00% |
| MasterChief vs Clive | 2–0 | 100.00% |
Limitations
This data is often requested to give insight into which characters you have more trouble with than others, but it is not particularly helpful for that. The main issue is that it is heavily skewed by how strong the opponents you play are.
For example, this data suggests my worst matchup is clearly vs Reina, but that's just because most of those games are vs Yagami.
There is a way to account for this being worked on. The central idea is to assign each matchup a rating vs you which adjusts based on the result, much like the regular rating but also based on the rating of each player. With this, it would give a better summary of how well you perform vs each character.
In the meantime, this page is here to present the data as requested.