Carlos Tevez urged the star to prolong his international career after Russia 2018.
Carlos Tevez has told Lionel Messi not to retire from international football following Argentina's chaotic World Cup in Russia.
It was a forgettable campaign for Messi and Argentina, who were eliminated by eventual champions France in the last 16 at Russia 2018 as Jorge Sampaoli later departed.
Argentina's tournament was marred by reports of unrest following a 3-0 group-stage defeat to Croatia after a 1-1 draw with Iceland left the South American giants on the brink of a humiliating exit.
Messi – still searching for his first senior international title – and Argentina managed to sneak into the knockout phase thanks to a last-gasp win over Nigeria but the team's shortcomings were exposed against France.
The international future of five-time Ballon d'Or winner Messi is uncertain after the 31-year-old retired briefly following Argentina's Copa America final loss to Chile in 2016.
Tevez urged Argentina to do more to ensure the country's all-time leading goalscorer can succeed on the world stage.
"I think Leo has to think about himself," Tevez – a 76-time Argentina international – told ESPN. "He has to think that, if there is not a project that makes him happy and in which he feels comfortable, it is very difficult to take the responsibility of leading Argentina to become champions by himself.
"We are wasting a lot of time not having him happy and not being able to give him a hand to achieve that target. I think we are wrong in not being able to help him feel comfortable.
"As a player and as an Argentine I tell him that we need him, that he tries to rest, that he keeps a cool head and that we need him. We need him because he is the soul of Argentina and, as long as he continues playing football, it has to be that way because he is Argentina's biggest idol and he has to take that responsibility.
"Now [I tell him] to rest, keep a cool head and try to be well, then we need him to take charge and on the pitch."
In the meantime, the focus is on Argentina replacing former head coach Sampaoli.
Peru boss Ricardo Gareca and Colombia's Jose Pekerman have been linked with the vacant post.
Pekerman led Argentina at the 2006 World Cup and Tevez – who was part of the squad that reached the quarter-finals in Germany – believes the Argentine Football Association (AFA) should bring back the 68-year-old.
"I think that the closest we were of winning a World Cup was with Jose (Pekerman)," the 34-year-old forward added. "When I felt closest to winning the World Cup was with Jose. If we had beaten Germany [in the 2006 quarter-finals], we knew we were going to be champions and we lost on penalties.
"Jose's era has taught me a lot from when I was a kid, I am very grateful to him, to Hugo Tocalli, to professor (Gerardo) Salorio to (Eduardo Julio) Ortasun... because today I am what I am because they put a grain of sand in what I was. I will always be grateful to them because they taught me a lot.
"They taught me to be a professional at 14 years old and today I continue at 34. It is essential to start as a child. From my personal experience, I think Jose is the man who can do it [be Argentina coach] quietly because he knows what is being talked about."