1989–90 Serie A
The 1989–90 Serie A season was another successful year for Napoli, with Diego Maradona being among the leading goalscorers in Serie A, behind Marco van Basten of Milan and Roberto Baggio of Fiorentina. But while Baggio's Fiorentina narrowly avoided relegation, Maradona's Napoli won their second Serie A title in four seasons, while Van Basten helped Milan retain the European Cup as compensation for their failure to win the Serie A title, having finished two points behind Napoli. Demoted to Serie B for 1990–91 were Udinese, Hellas Verona, Cremonese and Ascoli. In Europe, Sampdoria won the Cup Winners Cup and Juventus the UEFA Cup, making this year the most successful in Italian football history.
Teams
Genoa, Bari, Udinese and Cremonese had been promoted from Serie B.Final classification
Attendances
Source:| No. | Club | Average Attendance | Change |
| 1 | AC Milan | 59,054 | -18.3% |
| 2 | SSC Napoli | 58,264 | -5.7% |
| 3 | Internazionale | 50,142 | -13.8% |
| 4 | Juventus FC | 29,627 | -2.4% |
| 5 | Genoa CFC | 26,789 | 54.9% |
| 6 | Bologna FC | 26,391 | 16.7% |
| 7 | UC Sampdoria | 26,120 | 45.4% |
| 8 | AS Bari | 24,807 | 42.8% |
| 9 | Udinese Calcio | 23,472 | 5.7% |
| 10 | AS Roma | 22,067 | -36.8% |
| 11 | Atalanta BC | 21,966 | -11.1% |
| 12 | Hellas Verona | 21,429 | -15.1% |
| 13 | US Lecce | 20,816 | -8.3% |
| 14 | SS Lazio | 20,022 | -37.7% |
| 15 | ACF Fiorentina | 17,306 | -29.5% |
| 16 | AC Cesena | 16,583 | -4.3% |
| 17 | US Cremonese | 12,154 | 53.1% |
| 18 | Ascoli Picchio | 11,392 | -6.7% |