Southampton have suspended striker Dani Osvaldo for two weeks for fighting team-mate Jose Fonte at the club's Staplewood training ground.
Blood was drawn during the scuffle, instigated by the club's £15m record signing, but central defender Fonte was not seriously injured.
A Saints statement read: "The club has taken swift and proper action for what it considers a breach of the conduct expected of its players."
Osvaldo joined from Roma last summer.
He was also suspended by former club Roma in 2011 for punching team-mate Erik Lamela, now of Spurs, during a 2-0 defeat by Udinese.
Osvaldo, who was born in Argentina, has scored three goals in 13 Premier League appearances this season.
He will now miss his side's FA Cup fourth-round tie with Yeovil as well as Premier League fixtures against Arsenal and Fulham.