Will he be able to settle in a new country?
There is already a group of young Spanish-speakers at Old Trafford – the likes of David De Gea, Javier Hernandez and Angelo Henriquez – who can help him with the language and adapting to life in Manchester. Hernandez was a big help on the training pitch during his trial period, passing on the coaching instructions.
So, what's next?
The Under-20 World Cup in Turkey (21 June to 13 July). It will be another challenge for him and United have a good presence at the tournament (Henriquez with Chile; Tom Thorpe, Sam Johnstone and Larnell Cole with England). Brazil and Argentina did not qualify, which was a surprise, but it gives other teams and players a chance to impress and the Reds will be keeping a close eye on events.