Question: Stefano Nava was a backup for which former right-back who now is the assistant coach for the Ukrainian national team?
Related documents: [0]  [DOC] Stefano Nava (born 19 February 1969 in Milan) is an Italian former footballer, who played as a defender. He is best known for having played for A.C. Milan in the early 1990s, where he was a backup for players such as Franco Baresi, Paolo Maldini, Mauro Tassotti and Alessandro Costacurta. [END] 
[1]  [DOC] Mauro Tassotti (] ; born in Rome, 19 January 1960) is an Italian manager and former footballer who played predominantly as a right-back. He currently serves as an assistant coach for the Ukraine national football team. After making his Serie A debut with Lazio, he went on to play with A.C. Milan for 17 years. He won 17 major titles with the club, namely five Serie A championships and three UEFA Champions League tournaments, reaching five finals in total. He is mostly remembered for his role alongside Paolo Maldini, Franco Baresi, Alessandro Costacurta, Filippo Galli, and Christian Panucci in the Milan backline under Arrigo Sacchi and Fabio Capello, forming what is considered by many in the sport to be one of the greatest defensive lineups of all time. [END] 
Answer: 
Mauro Tassotti
Mauro Tassotti