Has there ever been a 5–5 in the Serie A?

Yes, 1 time.

The only time: January 12, 1941, Torino FC and Internazionale drew (Torino FC 5–5 Internazionale).

Nearby scores

1. 6–4 4 times
2. 6–5 2 times
3. 6–6 Never
4. 5–4 16 times
5. 5–5 1 time
6. 4–4 25 times