 He made his Milan debut on 5 September 1990, in a 1–0 home Coppa Italia victory over Triestina, as Milan went on to reach the final of the tournament.He made his Serie A debut with the club on 3 March 1991, in a 4–1 home win over Napoli.In his four non-consecutive seasons with Milan (1990–91 under Arrigo Sacchi, and 1992–995 under Fabio Capello), Nava made a total of 47 appearances in all competitions, and 21 Serie A league appearances, scoring 1 goal, which came in Serie A.