Tottenham Hotspur have made three additions so far this summer as Ange Postecoglou looks to assemble a squad capable of challenging for the top four. Lucas Bergvall has joined from Swedish side Djurgarden and has already impressed many during pre-season. Archie Gray has settled into life at Spurs quickly, too, having joined in a £40m switch from Championship outfit Leeds United. The latest addition Yang Min-hyuk hasn’t yet made his debut – he’ll join the first-team squad in January – but Tottenham goalkeeper Guglielmo Vicario is optimistic about his arrival. READ MORE: Tottenham tipped to make…