Has there ever been a 10–9 in the Brasileirão?

Never.

It would be a scorigami. Based on the average number of goals in the Brasileirão, the chance of a game ending 10–9 is about 1 in 195,654,802,758.

Nearby scores

1. 11–8 Never
2. 11–9 Never
3. 11–10 Never
4. 10–8 Never
5. 10–9 Never
6. 10–10 Never
7. 9–8 Never
8. 9–9 Never