Argentina coach Jorge Sampaoli revealed that he referred to Messi to help inspire his players before the match. "And I was really calm because I knew the match would come to our side, even if they didn't get a great start".
Since joining the Catalan giants from Premier League club Liverpool in 2010, Mascherano has been impressive for the Spanish club.
One way or another, the arrival of 23-year-old centre-back would arguably leave Mascherano as the fourth-choice option for Valverde as the manager also has Umtiti and Gerard Pique to cover the role.
"I try to fight for my place and, above all, to be ready for when I'm called upon". I will discuss matters that are more political than sporting, I have my thoughts but I will keep them to myself as I repeat I am just a Coach.
Argentina veteran Javier Mascherano confirmed he would retire from internationals after the 2018 World Cup in Russian Federation.
Mascherano said: "The decisions are taken by the coach and he will decide if I am in Russian Federation or not". "I will try in these six or seven months to prepare to be able to be in the World Cup".