A little-known transfer rule could play into the hands of Alexander Isak and provide him with some much-needed leverage as he attempts to force through a move to Liverpool. The transfer saga of the summer took another bitter turn on Tuesday night,

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.

That's how long it has been since Liverpool's £110m bid for Newcastle striker Alexander Isak was rejected. Since then, there have been no further offers. But it hasn't stopped the future of the 25-year-old Sweden striker being the biggest talking point of the summer window.