"That was for those who said we had an easy run in the draw," Scaloni told reporters after Friday's match.
"Sure, we deserved to win and go through, but it was an extremely difficult match."
Argentina arrived as heavy favourites but were forced into a draining battle as Cape Verde, huge underdogs on paper, levelled twice and pushed the champions deep into extra time.
"They finished the match absolutely knackered," Scaloni said of his players.
"There are areas for improvement, but they've shown resilience. The players are tired because of extra time – too many minutes – and some cramps. But when they play with their hearts, they can overcome anything.
"The team showed their character and their worth today."
Scaloni acknowledged that the contest was far less comfortable than many had predicted, especially after Cape Verde's second equaliser raised the prospect of a major upset.
Left back Sidny Lopes Cabral curled a superb shot into the top corner to put the teams back on level terms in extra time.
"I just wanted the match to be over," said Scaloni. "You saw the stunning goal they scored. I'm always wary. I was calmer than I looked.
"Everyone thought it would be a walk in the park, but we knew it wouldn't be."
Asked whether the responsibility of being favourites weighed on Argentina, Scaloni rejected the suggestion.
"No. The best thing about this team is that it just keeps going, keeps going, keeps going. The boys keep attacking with their hearts on their boots," he said.
"I think we rose to the occasion. The pitch was strange; the ball wouldn't run as we are used to, not ideal at all."
For Scaloni, the match was also a neat summary of Argentina's footballing condition.
"What does it mean to be Argentine? To suffer," he said.
"Cape Verde gave 200 per cent, and in football, that levels things out. The fans are the first to understand that this is Argentina, and nothing for us is easy.
"There is something special to this jersey. We will keep going forward, and there is no way we haven't come out of this stronger and will be moving forward."
World Cup 2026
The 2026 World Cup will be held from June 11th to July 19th in the United States, Canada and Mexico. The tournament will feature 48 national teams and will be played in 16 modern stadiums.
Match schedule and times | Draw | England at the World Cup | Team rosters at the World Cup | How to watch the World Cup | Predictions and odds | Team of the Group Stage
Watch the World Cup 2026 live on ITVX via Prime Video here - live coverage, highlights, and analysis.
