With Cristiano Ronaldo now a free agent following the decision to mutually terminate his Manchester United contract, people will naturally be wondering what the rules are around other English clubs potentially signing him before the January transfer window.
A few English clubs, as well as several organisations overseas, have been subsequently linked with the Portuguese superstar's signature, Arsenal surprisingly being one of them.
But can the Gunners even register the 37-year-old before the winter market officially opens? The answer is yes, though there are a few rules that need explaining first. With that in mind, football.london has taken a look at why Ronaldo can sign for Arsenal before the January transfer window below.