May 27 : Brazil's World Cup preparations were jolted on Wednesday as Neymar missed the national team's first training session to undergo medical tests, leaving his place in the squad hanging in the balance. The Brazilian Football Confederation (CBF) confirmed the 34-year-old forward, who is recovering from an injury in his right calf, did not take part in the closed session at their facilities in Granja Comary and was referred to a private clinic in Teresopolis for imaging tests. In a statement,