Tottenham Hotspur have joined Manchester United in the race to sign an ‘excellent’ teenager this summer transfer window, according to a recent report. Ange Postecoglou is eager to bolster his squad this summer ahead of a return to European football next season. The Australian boss has implemented a completely different style at the North London club and progression has certainly been made. As the summer window rapidly approaches, it seems he’s targeting a move for a teenage midfielder along with United. READ MORE: Tottenham planning to start talks to sign ‘unique’ £60m star in JuneTottenham Ho…