Mexican striker Carlos Vela is recovering well from a right hamstring injury and could be available for the second-round match with Argentina.
Vela did not play in Mexico's 1-0 loss to Uruguay on Wednesday, but one day later coach Javier Aguirre was encouraged with the player's progress.
Vela was injured in the previous match with France, a 2-0 win.
Aguirre says the team doctor has told him he expects Vela to be ready for the match Sunday (CBC, CBCSports.ca, 2 p.m. ET) if he continues to recover at the same rate.
Mexico brought in veteran striker Cuauhtemoc Blanco in place of Vela for the match against Uruguay, but the 37-year-old forward was ineffective in attack and was substituted in the 63rd minute.
Mexico defender Hector Moreno called on the team to recover its attacking edge, after the team only had three clear attempts on goal against Uruguay.
"A defeat always hurts your pride, but it will force us to return to the basics," Moreno said.
Moreno, who's taking part in his first World Cup, is not intimidated by the prospect of facing Argentina forward Lionel Messi.
"It's well known that they have great players, but like in any other match we have to concentrate on all their players, from their forwards to their goalkeeper," Moreno said.
Mexico lost to Argentina 2-1 in the second round at the 2006 World Cup but Moreno doesn't see the match as a chance for revenge.
"More than vengeance, I see it as a good opportunity to make history, which is what we want," he said.