The Barcelona stopper says his teammate is not the only player who will be under intense scrutiny as Alejandro Sabella's men prepare to challenge for glory in Brazil.
The 26-year-old has endured a frustrating club campaign in the past season, struggling with injury problems as Barca failed to defend its Liga title and suffered defeat in the Copa del Rey final and Champions League quarterfinals.
Messi now heads to the World Cup in Brazil as captain of one of the pre-tournament favorites, but Mascherano has stressed he is not alone in shouldering the responsibility next month.
"The first objective will be to minimise the number of errors of the team and arrive at the start of the World Cup in the best way possible," he told Ole. "The pressure in Brazil will be on everyone, not just Messi."
Argentina will face Bosnia-Herzegovina, Iran and Nigeria in Group F, beginning with a match against Safet Susic's side on June 15.