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.

Anyone in the UEFA Champions League semifinals can win it. Here's why Arsenal, PSG, Barcelona and Inter Milan will (and why they won't) win it.

The last four teams standing return to play in the UEFA Champions League this week for the first leg of the semifinals, when some of Europe's top sides will begin to map out their route to the final on May 31 at Munich's Allianz Arena.