Neymar skipped Brazil's opening World Cup training session on Wednesday to undergo additional medical tests on his bruised right calf, dealing a blow to the five-time champions' preparations. The Brazilian Football Confederation confirmed the forward remained in treatment for an injury that has kept him out since Santos' May 17 loss to Coritiba.

The 26-man squad assembled in Teresópolis, with PSG defender Marquinhos and Arsenal pair Gabriel Magalhães and Gabriel Martinelli scheduled to join after Saturday's Champions League final. Neymar attended the training center earlier but left for clinic examinations alongside Brazil's medical chief Rodrigo Lasmar, where he completed an MRI scan.

Brazil faces Panama in their first warm-up match this Sunday in Brasília, followed by Egypt on June 5. With test results pending, the 34-year-old's participation in either friendly appears doubtful. When questioned Tuesday about his availability, Neymar dismissed concerns with a simple 'What problem?'

Right-back Danilo also missed the session despite playing the full 90 minutes in Tuesday's Copa Libertadores victory. Manager Carlo Ancelotti now faces uncertainty over his star attacker's fitness just weeks before the tournament begins in the United States, Mexico and Canada.