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.

With a mixture of first-team players in doubt for Mikel Arteta’s side's trip to Stamford Bridge, a new and fresh face featured in Arsenal training

Arsenal coach Mikel Arteta said a 1-0 loss to Inter Milan in the Champions League was “very, very difficult to accept” after two penalty decisions went against his team.