Merino missed the Gunners’ most recent match - against Crystal Palace last Wednesday - and was a doubt for the first leg of Arsenal’s semi-final against PSG at Emirates Stadium on Tuesday. The Spaniard, however, took part in training on Monday afternoon and is expected to be fit for the game.

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.

Arsenal and Paris Saint-Germain are gearing up for a massive UEFA Champions League semifinal, with just 180 minutes separating them from a place in the final. The two sides met earlier in the group