Sabella pleased with Argentina display
Two Lionel Messi goals and a strike from left-back Marcos Rojo helped the Albiceleste to victory, while Ahmed Musa kept Nigeria in touch throughout with a double.
"We played a great game, besides the goals we let in," the former Estudiantes trainer told reporters pitch-side at the final whistle.
"We created a lot of goal opportunities. Now let us hope we continue like this, improving."
Sabella also referred to the defensive efforts of his team, warning that if the side pushed forward so much some frailty at the back was inevitable.
"We have a very attacking team and Nigeria are a team that break out very quickly, they are fearless, and these things can happen," he admitted.
Nigerian coach Stephen Keshi, meanwhile, paid tribute to Lionel Messi after the Super Eagles joined Argentina in the second round.
"I feel honoured, I feel happy. I just want to thank the players and the fans," Keshi told reporters after Nigeria became the first African team to reach the last 16 in this tournament.
"Messi is one heck of a player, you can't take it away from him. There are good calibre players in the Argentina team but Messi is from Jupiter. But we lost because we gave too much respect to the Argentines and did not play our game."
Argentina will play the Group E runners-up, likely to be Ecuador or Switzerland, in the last 16 while Nigeria will probably face France.