The UEFA Champions League is down to its final four teams, who will kick off their semifinal ties this week as a spot in the May 31 final at Munich's Allianz Arena feels within touching distance. Paris Saint-Germain and Barcelona,

According to Opta, Arsenal are the favourites to win the Champions League with a 31.3% chance after sensationally knocking out Real Madrid. Barcelona are second in line with a 27.4% chance of winning their seventh European crown, while PSG have a 22% shot at lifting the famous trophy in Munich.