Yahoo Sports reports: Neymar was back on the training field Tuesday, returning to action for the first time since he joined Brazil's World Cup squad while nursing an injured right leg. Neymar still wasn't at full speed, though, and did mostly physical conditioning at the team's training camp outside New York. The 34-year-old Neymar, playing at his fourth World Cup, has yet to join the rest of the squad in full training sessions during the team's preparations.