straight to your inbox every day for freeManchester United are hopeful Amad Diallo will develop into their long-term right winger.Diallo, 18, completed his £37million transfer from Atalanta this month and was one of two right wingers United signed in October, along with Uruguayan teenager Facundo Pellistri, following the failed pursuit of Borussia Dortmund forward Jadon Sancho.The last specialist right winger United signed prior to Pellistri and Diallo was Wilfried Zaha in the January 2013