A treble is on the cards if they can get past Inter and beat either Arsenal or Paris Saint-Germain in the Champions League Final.MORE — Barca win Copa del Rey | El Clasico player ratingsBarca haven't won the UEFA Champions League since a 2014-15 triumph over Juventus gave them five European Cups.

The last time these two teams faced in the knockout phase of the Champions League was in 2009-10 season. Here’s what happened that night.

Strange things happen when Inter Milan plays Barcelona in the Champions League semifinals. The last time the two teams met in the final four of Europe’s elite club competition, in 2010, Barcelona had to make a 15-hour journey by bus to Milan and lost that first leg 3-1.