The first legs of the UEFA Champions League semifinals are over, and now it's scenario time to know just what's needed to move on for a spot at the most coveted trophy in club soccer. Paris Saint-Germain's 1-0 win at Arsenal has the French club in a fantastic spot to make it to the big game though there won't be much room for error against the Gunners.

Scoring three away goals should make Inter Milan feel confident heading into the return leg of its Champions League semifinal against Barcelona on Tuesday. Inter might not think so, considering Barcelona’s ability to conjure goals out of nowhere with the world’s best young player in the side.

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.