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.

The injury to Havertz casts a new light on Arsenal's decision to bring in Gyokeres, while also starting an intense transfer battle with Tottenham for the likes of Eberechi Eze

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.