The Norwegian had recently returned from injury and featured off the bench against Tottenham, while also training fully during the week.
His omission therefore came as a surprise to supporters. However, manager Mikel Arteta confirmed the decision was purely medical, with a lingering knee issue prompting caution from the club’s staff.
"Unfortunately Martin is still not feeling totally comfortable with that knee injury, and we decided not to risk him," Arteta told reporters.
Arsenal opted not to risk a setback that could sideline their playmaker long term, prioritising his fitness for the remainder of the season.
