Lionel Messi is frustrated and desperate to turn Argentina's World Cup around, according to Javier Mascherano. Jorge Sampaoli's men are facing a group-stage exit in Russia after collecting just one point from their opening two games.

Messi, who turned 31 on Sunday, is yet to score or provide an assist at the showpiece event, while he had a penalty saved during a 1-1 draw with Iceland. The star, along with his teammates, came under heavy criticism following a shock 0-3 defeat to Croatia in the second game of the group. Mascherano, whose team must beat Nigeria tonight to have any chance of reaching the last 16, said the star forward was only human. "Leo is fine," he told a news conference. "But as a collective, where things don't go as we'd like, we all have our own frustrations.