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.

We don’t know any details and so speculation about Havertz’s injury and what Arsenal will do is just that — speculation. Havertz could miss a couple weeks, a month, a couple months, or the rest of the season.

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