Portugal Winger Ricardo Quaresma and defender Miguel Lopes had a training ground bust-up, the Portuguese press reported on Saturday, days ahead of their semi-final appearance at Euro 2012.
During one drill, Quaresma was pushed to the ground by Lopes whereupon the winger kicked out at the defender's legs. Team-mates quickly stepped in to prevent the situation getting worse.
Defender Ricardo Costa stood in front of Quaresma to calm him down while coach Paulo Bento also got involved.
"It's just normal things that happen in training," Costa said at a news conference later. "Things got a bit heated between two players. We're pumped up, we always want to win and sometimes small things happen.
"Everything's sorted now. We all want to play (in the semi-final) and sometimes stuff happens."
Portugal beat the Czech Republic 1-0 in the first Euro 2012 quarter final on Thursday. They will play the winner of Saturday's Spain-France match next Wednesday.