Defending champions Brazil began their pursuit of a fifth International Blind Sports Federation (IBSA) Blind Football World Championships title by hammering Mali 6-1 on day two in Madrid.
The four-time and reigning Paralympic gold medallists were far too strong for the African nation at the Colegio Sagrado Corazón.
Jefinho gave Brazil the lead in the Group D encounter and Gledson doubled the advantage.
A third followed through Ricardinho and Tiago da Silva made it 4-0.
Gledson was able to complete his hat-trick before Mamadou Thiam bagged a consolation for Mali.
Elsewhere, two matches were played in Group B.
Colombia have gone top in the early going thanks to a 3-1 victory over France, which bettered Argentina's 1-0 success over Iran.
One match was played in both Group A and Group C.
In the former, Morocco won 2-1 in a surprise victory over Turkey.
China won the Group C clash by beating Asian rivals South Korea 2-0.
Five more group matches will be played tomorrow.