Tottenham Hotspur impressed in their opening pre-season friendly on Wednesday night at Tynecastle. It was a night which saw Ange Postecoglou field two different sides in each half with the minutes spread out across the squad. The Lilywhites cruised to a 5-1 victory but perhaps the most pleasing aspect of the night for Tottenham was the performances of some of their young prospects. On their debut, the likes of Archie Gray and Lucas Bergvall put in some impressive performances that will have caught the eye of the travelling fans. The Spurs youngsters put on a real show in the second half with f…