Pumas will be Barcelona's opponent in the Joan Gamper trophy to be played on August 7 at Camp Nou, as announced by the Catalan club.
Barcelona had been scheduled to face Jose Mourinho's AS Roma, before the Italian club pulled out.
The match is scheduled to kick off at 20:00 local time. The women's team will face Montpellier on August 23 also at 20:00 at Estadi Johan Cruyff.
The idea was that Barcelona would face the same opponent in both categories, but it was not possible.
After Roma cancelled on the men's team, Barcelona then negotiated with Milan and Atlas, but without success.
The reason for so many problems in finding an opponent was that the ECA pressured European clubs not to attend the Gamper Trophy because of Barcelona's support for the European Super League. And, in the end, Barcelona were unable to find an opponent on the old continent.
CSKA Moscow 
FC Rostov 
Leicester 
Chelsea 
Valencia 
Betis 
Dynamo Kyiv 
Chornomorets Odesa 
Verona 
Inter 
Bayer Leverkusen 
FC Heidenheim 
Borussia Dortmund 
SC Freiburg 
VFL Wolfsburg 
Union Berlin 
Arsenal 
Nottingham Forest 
Everton 
Brentford 
Spartak Moscow 
Lokomotiv Moscow 
Rangers 
Dundee Utd 
Atletico Madrid 
Alaves 
Lens 
Marseille 
Ingulets Petrove 
Shakhtar Donetsk 
AC Milan 
Juventus 
ST Malo 
Bordeaux 
Manchester City 
Tottenham 
Eintracht Frankfurt 
Werder Bremen 
Girona 
Espanyol 
Feyenoord 
Heerenveen 
ST Etienne 
Montpellier 
Grenoble Foot 38 
Heart Of Midlothian 
Celtic 
Reims 
Lyon 
PSV 
Groningen 
Celta Vigo 
Barcelona 
Benfica 
Estrela Da Amadora 
Sparta Rotterdam 
AZ Alkmaar 
Southampton 
Liverpool