straight to your inboxThe signing of Borussia Dortmund winger Jadon Sancho remains Manchester United's number one priority for the summer window, but the club have so far been frustrated in their pursuit of the England international.United’s interest in the 20-year-old is long-standing, but negotiations between Dortmund and the Reds over a transfer of the winger have reached an impasse.Dortmund set an initial deadline of August 10 for any deal to take place but that was missed and not taken