The jet-heeled winger wasnt part of the squad that suffered a narrow 1-0 defeat in the Premiership at Old Trafford. Instead, Hossam Ghaly made his debut and did well in Aarons regular spot on the right of midfield.
Boss Martin said: "Aaron picked up an injury in training so we couldnt consider him for selection.
"Maybe he needs an operation but maybe well give him another weeks rest because its only a small tear in his cartilage so hopefully it will be okay. Well make an assessment and well know for sure.
"Its a disappointment but we played without him in pre-season and others did well so Im confident we can play with the other players and get the results as well."
Martin Jol reported that Aaron Lennon missed Saturday's clash at Manchester United with a knee injury sustained in training on Friday.