Argentina defeated Bosnia-Herzegovina 2-1 in their first World Cup match at the legendary Maracana stadium on Sunday.
A Lionel Messi wonder-strike lit up an otherwise fairly dour affair in which Alejandro Sabella's side were troubled by an excellent Bosnia-Herzegovina outfit.
It was the start the Albiceleste had been hoping for, putting them in a good position to win their group and launch themselves into the knockout stages with confidence and momentum.
Bosnia-Herzegovina, meanwhile, will still be hopeful of gaining the points they need against Iran and Nigeria to go through as well.
Here are six things we learned from the game.