The Brazilian soccer confederation says tests conducted Saturday ruled out any major injury on Luis' right thigh, but the player missed practice to undergo physiotherapy.
Luis was replaced at halftime of Brazil's quarterfinal against Paraguay on Thursday, when the hosts advanced on penalties.
The Brazilian confederation says Fernandinho has pain in his right knee and continues to undergo treatment. The midfielder got hurt in Brazil's second game in the group stage.
Richarlison was sidelined before the match against Paraguay because of mumps. The confederation says the striker's condition has improved and he is expected to rejoin the rest of the squad by Monday.
Brazil is playing without Neymar because of an ankle injury suffered before the tournament.
The hosts face Argentina on Tuesday at the Mineirão Stadium.