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.

The Gunners beat PSG 2-0 in the league phase of the Champions League way back at the start of October and it was fairly comfortable for them, although PSG did hit the woodwork twice and showed glimpses of the team they have become.

PSG are two games away from making the UEFA Champions League final in Munich. First, they must defeat Arsenal over two legs, the first being at the Emirates on