Manchester United interim manager, Ruud van Nistelrooy, has hailed Amad Diallo following his match-winning display against PAOK on Thursday. Amad scored a brace in the second half as United beat the Greek side 2-0 in the Europa League. It was the Red Devil’s first win in the competition this season. “He made a difference today, because of his goals, but he was very sharp,” Van Nistelrooy told TNT Sports. “Well done to him, good game. Positionally, we weren’t good in the first half. We were much better at that in the second half. “He has been incredible in training; he always trains well and is…