Argentina were stunned by Nigeria in a friendly game played in Russia without their superstar Lionel Messi.
Ever Banega opened scoring for the Argentines in the 27th minute, with Sergio Aguero making it two in the 36th minute.
But Nigeria turned it around when Kelechi Iheanacho put a free kick past keeper Agustin Marchesin before the break, then set up Iwobi and Brian Idowu to score two minutes apart early in the second half.
Iheanacho found Iwobi in the centre of the box to equalise with a first-time shot, then Idowu pounced to score from 18 yards after the Leicester man’s loose touch fell to his feet.
Iwobi then added his second goal in the 73rd minute after wrong-footing Javier Mascherano.
Brian Idowu scored the third goal on his debut. The Super Eagles won the game after a dramatic turnaround with some players making their debut.