Fischer Kondowe scored both goals to hand Lidoda Duvha a much-needed win, while Surprise Moriri scored a consolation goal for the Brazilians, who also saw Lerato Chabangu dismissed in the second half.
The Brazilians made the early start with Josta Dladla prominent in the opening stages.
The winger sent a shot into the side-netting in the sixth minute from inside the area, an effort he should have at least put on target given that he was unmarked and with a clear sight on goal.
Leopards were clearly looking to catch the hosts on the break and they did just that in the 24th minute when Kondowe shrugged off Vuyo Mere to run onto Myron Shongwe’s through-ball, before coolly slotting the ball past Brian Baloyi.
Sundowns should have leveled matters in the 31st minute when Patrick Apataki ran onto a good pass by Godfrey Sapula, but the striker sent his first-time shot just wide of goal from close range.
Leopards threatened to extend their lead five minutes later when Jabulani Maluleke sent in a fierce volley from outside the area, but Baloyi produced a good save to tip the ball around the post for a corner.
The score remained 1-0 at half-time.
Sundowns made a double substitution at the start of the second half, with Peter Ndlovu and Brent Carelse coming on for Apataki and Sapula respectively.
Ndlovu should have made an almost immediate impact when he astonishingly sent his shot from six yards woefully wide of an empty net after the entire Leopards defence, including goalkeeper Ephraim Tjihonge, missed a good low cross from Dladla.
Dladla almost leveled matters in the 51st minute, but his shot was deflected onto the crossbar.
However, Leopards doubled their lead a minute later following very poor defending by the Brazilians, which allowed David Thwala to put in a low cross from the left flank, which Shere Lekgothoane completely missed, allowing Kondowe the easy task of tapping home from within five yards.
The visitors almost made it 3-0 in the 56th minute from a corner, but striker Shongwe saw his powerful header fly straight into the arms of Baloyi.
Carelse then sent a header just wide of the Leopards from a good free-kick by Lerato Chabangu in the 59th minute.
Sundowns’ night got worse in the 70th minute when they were reduced to 10-men after Chabangu received his marching orders for stamping on Maluleke after the Leopards man fouled him.
Sundowns pushed more men forward as they tried to get back into the game, and they were rewarded when Surprise Moriri headed home from a cross by Ngwenya two minutes from the end, but by then it was all a little too late for the Brazilians.