"Our goal in this World Cup is initially to win a single match. Of course, we want to win every game but it is a strong group."
Paraguay open their campaign against South Africa on 2 June, play Spain on 7 June and Slovenia five days later.
Italian Maldini, who took over the national side from Sergio Markarian, has experienced an upturn in fortunes after a harrowing first few months in the job.
He has constantly been castigated in the Paraguayan media over his team selections and his apparent unwillingness to spend time in the impoverished country.
Maldini came under further pressure when Paraguay were thrashed 4-0 in a warm-up game by England.
But he secured his first win when the South Americans inflicted a 2-1 defeat on Sweden in Stockholm earlier this month.
"It was the first time I had worked with a full-strength team and we demonstrated that we are a good side," he said.