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.

This season's Champions League is nearing its conclusion, with Arsenal, Paris St-Germain, Inter Milan and Barcelona the four sides left vying for a place in the final. Mikel Arteta's Arsenal will take on Ligue 1 champions PSG,