Paolo Cesare Maldini (Italian pronunciation: ['pa:olo mal'di:ni]; born 26 June 1968) is an Italian former professional footballer who played as a left-back and central defender for A.C. Milan and the Italy national team. He spent all 25 seasons of his career in the Serie A with Milan, before retiring at the age of 41 in 2009. He won 23 trophies with Milan while in the squad: the UEFA Champions League five times, seven Serie A titles, one Coppa Italia, five Supercoppa Italiana titles, four European Super Cups, two Intercontinental Cups and one FIFA Club World Cup. Maldini made his debut for Italy in 1988, enjoying a 14-year career before retiring in 2002 with 126 caps, a record at the time, which has since only been topped by Fabio Cannavaro in 2009 and Gianluigi Buffon in 2013.
1991-1996: Continued success with The invincibles
Under Sacchi's replacement, Fabio Capello, Milan would continue to be a dominant force in Italy and in Europe. Maldini was also part of Milan's undefeated Serie A team, which won the championship in the 1991-92 season; in total, Milan went unbeaten for an Italian record of 58 league matches, earning the nickname "The Invincibles". This championship would be Milan's first of three consecutive Serie A titles under Capello in the early 1990s. Maldini helped Milan defend the Serie A title the following season, and reach the first of three consecutive UEFA Champions League finals. Milan would lose the 1993 Champions League final in a 1-0 defeat to Marseille. That season, Maldini scored his first goal in European Competitions on 21 October 1992 in a 1-0 Champions League win against Slovan Bratislava. The following season, Milan captured their third consecutive Serie A title, finishing with the best defence in Italy, conceding just 15 goals. Maldini also helped lead Milan to a second consecutive Champions League final, where he helped his team defeat Barcelona. Due to Alessandro Costacurta's suspension and injuries sustained to Franco Baresi, Jean-Pierre Papin and Marco van Basten, Barcelona's "Dream Team", coached by Johan Cruyff, were heavy favourites to win the trophy, with the formidable attacking duo of Romario and Hristo Stoichkov. Despite their key absences, Maldini helped the Milan defence keep a clean sheet and overcome Barcelona 4-0 in the final, with two goals from Daniele Massaro and one each from Dejan Savicevic and Marcel Desailly.  After winning his third Champions League title and reaching the 1994 World Cup final, Maldini became the first defender ever to win World Soccer magazine's annual World Player of the Year Award. During his acceptance speech, Maldini called his milestone "a particular matter of pride because defenders generally receive so much less attention from fans and the media than goalscorers. We are more in the engine room rather than taking the glory". He then singled out Milan captain Franco Baresi as a player who "really [deserved] to receive the sort of award I have received". Maldini also placed third in the 1994 Ballon d'Or, behind Stoichkov and compatriot Roberto Baggio, and fifth in the FIFA World Player of the Year Award.  The following season, Milan and Maldini captured their third consecutive Supercoppa Italiana under Capello, and won the UEFA Super Cup, missing out on the Intercontinental Cup. After three consecutive titles, Milan were unable to retain their Serie A title, although they reached their third consecutive Champions League final, where they were defeated 1-0 by Ajax. Maldini came second behind future teammate George Weah in the 1995 FIFA World Player of the Year Award for his performances. Maldini was able to capture his fifth Serie A title, and his fourth under Capello, the following season.

Q: How are the Invincibles and Maldini related?
A: total, Milan went unbeaten for an Italian record of 58 league matches, earning the nickname "The Invincibles".

Q: Which years did he play?
A: 1990s.
Are there any notable acheivements during the 1990s by Maldini?
Maldini helped the Milan defence keep a clean sheet and overcome Barcelona 4-0 in the final,
Maldini helped the Milan defence keep a clean sheet and overcome Barcelona 4-0 in the final,