Cesc Fabregas and Jadon Sancho would have been forbidden to make the international transfers which made their careers under new post-Brexit transfer rules.
The UK left the European Union single market at 11pm on Thursday, just before the January transfer window opens on January 2.
Brexit will see an end for the freedom of movement of labour for EU citizens here – and the end to signing Under 18s. Spaniard Fabregas joined Arsenal at the age of 16 after coming through the Barcelona academy and made over 200 appearances for the club.
Young British talent, like Jadon Sancho and Jude Bellingham of Borussia Dortmund, will now not be able to play in Europe until they are 18.
Read more on mirror.co.uk