Manchester United take on Greek side PAOK on Thursday night and that means a return to Old Trafford for one player. Manchester United’s focus turns back to the Europa League on Thursday night as PAOK visit Old Trafford. This will be Ruud van Nistelrooy’s penultimate game in charge of United as his run as interim boss nears its end. Ruben Amorim has been appointed as United’s new head coach and will take over from Van Nistelrooy in the international break. Amorim’s Sporting side beat Manchester City 4-1 on Tuesday night and Van Nistelrooy would love a similar result against PAOK. United have ye…