The action began with a colourful opening ceremony before the main drama took over, with hosts Brazil taking on Croatia.
The match began in disastrous fashion for the Selecao, as Marcelo netted past his own keeper, but a double from Neymar and a late strike from Oscar sealed the win.
There was plenty of praise for the Barcelona star from his peers on Twitter, with almost every player glued to their TV screens to take in the World Cup opener. Check out the best of the remarks with the latest edition of Word on the Tweet...
|WE ARE ONE... Pitbull and J.Lo get the party started
|PAPAL SEAL OF APPROVAL... Even the Pope got involved
SPIDER OR SNAKE?... Boredom strikes in the Australia camp
I wish everyone a wonderful World Cup, played in a spirit of true fraternity.— Pope Francis (@Pontifex) June 12, 2014
|WATCHING ON... National teams gather to soak up the opener
|WE HAVE LIFT OFF... Neymar sends the crowd, and his peers, wild
Fireworks going off everywhere after that goal!— Massimo Luongo (@MassLuongo) June 12, 2014
|SEALED WITH A KISS... Oscar grabs the third and Brazil claim victory
Congratulation my bro @oscar11 for your goal.— Eden hazard (@hazardeden10) June 12, 2014