By Tom Gott Ange Postecoglou’s second pre-season as Tottenham Hotspur manager is already underway. Spurs kicked off their summer festivities with a comprehensive 5-1 win over Hearts and are preparing to head to Japan, a land Postecoglou knows well, and South Korea to remove some of the rust and get themselves ready for the fight that awaits them in the Premier League next season. 18-year-old Archie Gray, a £35m signing from Leeds United, headlines the group of young players trying to impress the boss, but Spurs boast one of the most stacked youth setups in the country and there will be some se…