Tottenham Hotspur may face a battle to keep hold of one of their prized assets in the academy. Spurs certainly aren’t short of talented prospects at the moment and Ange Postecoglou has proven he’s ready to place his faith in youngsters. Both Destiny Udogie and Pape Matar Sarr played key roles in the first-team last season while a couple of academy prospects made their debuts. Jamie Donley was handed minutes on three occasions in the Premier League while also making an appearance in the FA Cup. Mikey Moore became the next Spurs academy product to make his debut on the penultimate day of the sea…