Miami, July 3 -- Cabo Verde's veteran goalkeeper Vozinha has called on his nation to stand united as the FIFA World Cup debutants prepare for the biggest match in their football history against defending champions Argentina in the Round of 32.

The Blue Sharks have emerged as one of the surprise packages of the tournament, becoming the smallest nation ever to qualify for the knockout stages of the FIFA World Cup.

Their disciplined performances in the group stage included a goalless draw against European champions Spain, a thrilling 2-2 draw with Uruguay, and another clean sheet in a 0-0 stalemate against Saudi Arabia.

Cabo Verde also became the first team since Chile at the 1998 FIFA World Cup to progress beyond the group stage after dr...