Manchester City striker Sergio Aguero feels sorry that teammate Carlos Tevez has been unable to settle his differences with manager Roberto Mancini.
"Unfortunately, the club and Carlitos (Tevez) haven't reached an agreement and it pains me, as an Argentine and a teammate, it makes me sad," said Aguero, who is in the Argentina squad for World Cup qualifying matches against Bolivia and Colombia.
Tevez, left out of the Argentina squad, provoked a scandal in September when Mancini believed he refused to come on as a substitute during City's 2-0 Champions League loss to Bayern Munich.
Tevez has insisted he was misunderstood and never refused to play.
"I can't get involved in defending Carlos or the club because I don't know what happened," Aguero said, "Only they know. It's a shame for everyone."
Mancini says he is willing to forgive the striker if he says he's sorry, but Tevez has not yet apologized and hasn't played for City since the incident.
Aguero was in the starting lineup for City's 3-2 win against Queen's Park Rangers on Saturday, with Tevez again absent.
As well as being sidelined by City, Tevez's last match for Argentina was during the 2011 Copa America in July, when he missed a penalty in the 5-4 shootout loss to Uruguay.
Argentina opened World Cup qualifying with a 4-1 home win against Chile, but lost 1-0 at Venezuela in its second match.
Bolivia will visit Buenos Aires on Friday, with Argentina traveling to play Colombia four days later.
Argentine coach Alejandro Sabella has added Boca Juniors duo Agustin Orion and Clemente Rodriguez and Estudiantes pair Rodrgio Brana and Leandro Desabato to the squad for the two matches.