Awarded a 7/10 rating for the impact he made, there was no denying that Arsenal looked a much more dominant side when Merino entered the fray at Stamford Bridge. Although Martin Odegaard's return to the fold added creativity to an engine room which has been starved of ideas lately, his teammate can also take credit for adding much needed dynamism.

Arsenal head to Chelsea seeking to end a run of three games without a win as Mikel Arteta faces decisions on whether to play Martin Odegaard and Declan Rice from the start