Barcelona manager Gerardo Martino is expected to leave the club at the end of the season and take charge of the Argentina national team, according to Fichajes.net.The 51-year-old only took over at the Nou Camp at the start of this season, but his side’s Champions League quarter-final exit at the hands of La Liga rivals Atletico Madrid has increased the pressure on the Argentine, who has received criticism already at various points this season.Adopting a slightly more direct style of play, fans have expressed a desire for a change in approach to see the team playing as it did under predecessors Pep Guardiola and Tito Vilanova.It is believed that Martino too would be open to leaving the Catalan giants, and it is thought that he will have a role with the Artgentina national side waiting for him after this summer’s World Cup.Current manager Alejandro Sabella is expected to leave the role after the tournament in Brazil, and Martino has pedigree at international level with Paraguay, with whom he impressed in a five-year spell between 2006 and 2011.However, it is his inexperience at top club level football that may be behind his struggles with Barca this season.Manchester City manager Manuel Pellegrini has already been suggested as a possible replacement for Martino next season.Super Sunday! Liverpool and Manchester City meet at Anfield + Swansea City face Chelsea at the Liberty Stadium for ONLY 9.99.