Dusan Vlahovic told reporters that allegations he was having an affair with the wife of one of his international team-mates was "absurd".
Juventus striker Vlahovic, 22, has played just 24 minutes at the World Cup after suffering an injury while on club duty. He sat out the 3-3 draw with Cameroon, which left Dragan Stojkovic's side needing a win against Switzerland in their final group game to progress to the knockout stages in Qatar.
Reports on the continent have alleged the former Fiorentina star has been having an affair with the wife of World Cup colleague Predrag Rajkovic. However, the striker made a point of addressing the claims ahead of a crucial game for his national side.