Miguel "Piojo" Herrera, a former manager of Mexico, has criticized El Tri's upcoming friendly match against Paraguay, which will feature a number of unproven players who won't likely participate in the World Cup.

On August 31, Mexico will fly up to Atlanta's Mercedes-Benz Stadium for a friendly match against Paraguay. Current El Tri manager Gerardo "Tata" Martino will field an all-Liga MX lineup, largely made up of backup national team players, for the non-FIFA match.

In these games, we shouldn't raise expectations merely for show, Herrera, who is currently in charge of Liga MX team Tigres, remarked at a press conference.

"These are the games that don't work for me because 80% of the call-ups won't be playing in the World Cup," the player said.

Herrera continued, "The opponent [Paraguay] is extremely excellent, but this is not a match that will help the national team prepare for the World Cup.

Despite this, Herrera applauded two of his Tigres players for making the Mexico team: Sebastian Cordova and Jesus Angulo. However, Herrera also criticized the omission of veteran and in-form defender Diego Reyes.

The Tigres coach reported that "He's doing great." Reyes was a member of the national team already.

From 2013 to 2015, Herrera served as the head coach of Mexico's national team, assisting them in reaching the 2014 World Cup's Round of 16 and helping them qualify for the tournament. He lost his job in the summer of 2015 after an altercation with a reporter.

Martino was recovering from eye surgery when Herrera made waves earlier in March of this year by putting his name in the running to manage Mexico.

In light of El Tri's recent struggles in World Cup qualifying, Herrera advised Martino to step down if he "doesn't have the health."