The injury to Havertz, 26, leaves the Gunners with just one healthy center forward — new signing Viktor Gyokeres — as Gabriel Jesus has yet to return from last season's ACL injury.

Arsenal forward Kai Havertz is set for a spell on the sidelines after suffering a knee injury, sources have told ESPN. The 26-year-old missed an open training session at Emirates Stadium on Wednesday but it is currently unclear how severe the issue is.

Arsenal are expected to first look at the loan and bargain basement markets if Kai Havertz is ruled out for a prolonged period of time with a knee injury.