A reborn Argentina swamped Costa Rica 3-0 to reach the quarterfinals of the Copa America in style courtesy a brace from Sergio Aguero and another from Angel Di Maria.
Aguero, on from the start with Carlos Tevez benched in a revamped forward line, netted seconds from half-time after the hosts had dominated the opening stages.
With Lionel Messi magnificently pulling the strings just behind the main strikers, Atletico Madrid star Aguero made the points safe with a second goal seven minutes after the restart to take his tally at the event to a tournament-high three.
Di Maria then finished off the outclassed Ticos with the third just after the hour mark as Argentina joined Group-A winners Colombia, Chile, Peru and Venezuela in the quarters.
"This was a real tonic… just what we needed," said Aguero.
"We played very well and got the goals --- but the main thing was we gelled as a team. Now we have to keep it up."
Javier Pastore, a late substitute for the profligate Gonzalo Higuain, who could have at least doubled the margin, agreed.
"That was a really important win and a good team performance - our attitude was spot on," he said. Coach Sergio Batista was under huge pressure to deliver a win and secure passage to the next round with the hosts seeking their first major trophy since 1993.
Messi the master
And after their slow start, he rang the changes with Tevez and Ezequiel Lavezzi benched and Higuain brought in as a classic centre forward allowing Messi to concentrate more on his string pulling out of the immediate firing line.
Where Messi in particular was concerned, the plan worked like a dream, as the Barcelona man was involved in almost every move, tearing Costa Rica's defence to shreds with his incisive passing and weaving in and out.