Paris St Germain have called for Bastia striker Brandao to be banned from soccer for life after he appeared to headbutt Italian international Thiago Motta.
At the end of PSG's 2-0 Ligue 1 home win, television cameras showed players and security personnel milling around the tunnel as blood poured from midfielder Motta's nose.
Nasser al-Khelaifi, president of the French champions, told a Canal Plus TV reporter that his club would be registering a complaint against Brandao.
Al-Khelaifi added that the Brazilian should be "suspended for life... he is not a football player".
The incident overshadowed PSG's first league victory of the season after the early loss of talisman Zlatan Ibrahimovic.
The Sweden striker, last season's Ligue 1 Player of the Year, was forced off with a leg injury in the 15th minute but Laurent Blanc's team still managed to control the game.
Brazilian Lucas Moura opened the scoring after 26 minutes when he pounced on a cross from Gregory van der Wiel and made no mistake from close range.
PSG's Edinson Cavani looked sharp in attack throughout and he made it 2-0 after 57 minutes, taking a pass near the penalty spot with his back to goal and swivelling gracefully to give PSG four points from their first two games of the campaign.