Arsenal are waiting to see if Kai Havertz is going to be on the sidelines for a period of time after the forward picked up a knee injury. The 26-year-old was not part of the open training session held at Emirates Stadium on Wednesday and the injury is being assessed by the medical department.

Arsenal forward Kai Havertz is set for a spell on the sidelines after suffering a knee injury, sources have told ESPN.

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