Arsenal forward Gabriel Jesus will need surgery on a serious knee injury as Gunners boss Mikel Arteta scrambles to replace the Brazilian in the January transfer window.

Arsenal announced Gabriel Jesus suffered an ACL injury in his left knee against Manchester United in the FA Cup with the striker set to undergo surgery.

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. The Athletic reported on Tuesday that Jesus suffered a ruptured ACL during Arsenal's penalty-shootout defeat to Manchester United.