Gerardo Martino resigned as Argentina coach this summer. AP Photo/Victor R. Caivano

Former Argentina national team manager Gerardo "Tata" Martino is in talks to coach MLS expansion side Atlanta United, multiple sources confirmed to ESPN FC, though they stressed that a deal is not done.

Former Seattle Sounders manager Sigi Schmid is among those waiting in the wings after interviewing with the club last week, the sources added.

Atlanta's link to Martino, earlier reported by Telemundo, comes as the team prepares for its inaugural MLS season in 2017.

Martino has been out of work since resigning as Argentina's manager following the 2016 Copa America Centenario earlier this summer.

He blamed his decision to resign on the chaos surrounding the leadership of the Argentina Football Association, which has been in turmoil since the death of president Julio Grondona in 2014, with Luis Segura resigning as president earlier in the year following his arrest on fraud charges.

Before Argentina, Martino was the manager at Barcelona in the 2013-14 season. He has previously coached Newell's Old Boys, Paraguay's national team -- which he took to the quarterfinals of the 2010 World Cup -- as well as Paraguay-based sides Libertad and Cerro Porteno.

Schmid was relieved his duties in Seattle on July 26, as the Sounders were mired near the bottom of the Western Conference.

The 63-year-old has a connection with Atlanta's front office, having coached current technical director and former U.S. international defender Carlos Bocanegra when the two were at UCLA.

Schmid won a total of five trophies with Seattle and claimed an MLS Cup and Supporters' Shield double with both the LA Galaxy and Columbus Crew SC.