United are optimistic the forward, who has also received Italian citizenship, will be granted a United Kingdom work permit to enable him to travel to Manchester next month.

The Premier League club confirmed they had agreed a deal for the 18-year-old on transfer deadline day in October, shortly after Diallo's proposed move to Parma collapsed.

Ole Gunnar Solskjaer moved for the winger after their long pursuit of Borussia Dortmund's England international Jadon Sancho failed.