Vieira was appointed assistant manager to Moroccan national side in the 1986 FIFA World Cup in Mexico and alongside compatriot José Faria he led Morocco in to the second round of the tournament, becoming the first African side to do so in the process.
Vieira was appointed assistant manager to Moroccan national side in the 1986 FIFA World Cup in Mexico and alongside compatriot José Faria. He led Morocco compatriot José Faria in to the second round of the tournament. He was becoming the first African side. This was to do so in the process.