Arsenal manager Mikel Arteta has admitted Gabriel Jesus' knee injury is "not looking good," with sources telling ESPN the club fear he will miss the remainder of the season.

Arsenal's Brazilian forward Gabriel Jesus is set for a lengthy spell on the sidelines after suffering what is suspected to be an anterior cruciate ligament (ACL) injury, according to British media reports on Tuesday.

Arsenal forward Gabriel Jesus will have an operation on his left knee after sustaining an anterior cruciate ligament injury. Jesus, 27, was taken off on a stretcher during Sunday's FA Cup third round defeat by Manchester United at Emirates Stadium. The Brazilian has made 27 appearances across all competitions this season, scoring seven goals.