defeating the same side 1–0 in the final.[19]

On 2 June, Inter announced on their official website that they had appointed former Porto and Chelsea boss José Mourinho as new head coach, with Giuseppe Baresi as his assistant. This made Mourinho the only foreign coach in Italy in the 2008–09 season kick-off.[14] Mourinho made only three additions to the squad during the summer transfer window of 2008 in the form of Mancini,[15] Sulley Muntari,[16] and Ricardo Quaresma.[17] Under Mourinho's first season as Inter head coach, the Nerazzurri won an Italian Super Cup and a fourth consecutive title, being, however, also eliminated from the Champions League in the first knockout round for a third consecutive time, losing to Manchester United. In winning the league title for the fourth consecutive time, Inter joined Torino and Juventus as the only teams to do this and the first to accomplish this feat in the last 60 years.
Inter enjoyed more luck in the 2009–10 Champions League, managing to progress to the quarter-finals by eliminating Mourinho's former team, Chelsea, in a 3–1 aggregate win; this was the first time in three years that the Nerazzurri had passed the first knockout round. Inter then progressed to the semi-finals of the tournament by beating CSKA Moscow 2–0 on aggregate, winning both legs. Inter managed to achieve a 3–1 win over incumbent champions Barcelona in the first leg of the semi-final. In the second leg, a resolute Inter lost 1–0 but progressed 3–2 on aggregate to their fifth European Cup/Champions League Final, with Bayern Munich as opponents. They won the match 2–0 thanks to two goals from Diego Milito, and were crowned champions of Europe.[18]
Inter also won the 2009–10 Serie A title by two points over Roma, and the 2010 Coppa Italia by defeating the same side 1–0 in the final.[19]
By winning the Scudetto, the Coppa Italia and the Champions League in a single season, Internazionale completed The Treble, becoming the first ever Italian team to achieve the feat. However, their attempt to defend these honours are without José Mourinho, as he agreed a deal to take charge of Spanish club Real Madrid on 28 May 2010.[20] Inter appointed Rafael Benítez as new coach after signing a two-year contract on June 2010.
On 21 August 2010, Inter defeated Roma 3–1 and won the 2010 Supercoppa Italiana, the fourth trophy of the year. In December 2010, they claimed the FIFA Club World Cup for the first time after a 3–0 win against TP Mazembe in the final.[21] Internazionale completed the Quintuple, becoming the fourth team in the world after Liverpool in 2001, Al-Ahly in 2006 and Barcelona in 2009.
However, after this win, on 23 December 2010, due to his poor performance in Serie A and separated by 13 points from the leader Milan (although Inter played two games less, because of the FIFA Club World Cup appointment), the team announced Rafael Benítez's departure on their website.[22] He was replaced by Leonardo the following day