Explained: The Swedish striker is determined to leave St James’ Park and Fifa’s amendments to article 17 give him an exit route next summer that would potentially cost Newcastle millions of pounds

You've probably seen coverage of the Alexander Isak transfer saga, but you are probably far less familiar with a little-known FIFA rule called Article 17. It could be the key to unlocking Isak's future.

Alexander Isak has spoken publicly for the first time since his future became the biggest talking point this summer. Liverpool had a £110m bid rejected for the forward, who is currently not training with the first-team at Newcastle.