Iqraam Rayners broke the deadlock in the Betway Premiership clash after 53 minutes. Tashreeq Matthews then sealed the result with his goal in the first minute of stoppage time at the end of the game.
It was an important result for the Brazilians after they started the new season with a 1-1 draw with Chippa United.
But despite the win, Cardoso said his side struggled to play their game on what he described as a "absolutely horrible to play football."
Speaking after the match the Brazilians boss said on SuperSport: "Two very different halves of football. The first one, I think there was too much mobility on the pitch, it's also not very good.
"And I think that we had a lot of players out of position because of too much mobility.
"And that took us to a very uncomfortable place in order to play football, some uncertainty, not finding the connections, not finding the players in the places where usually we find them.
"Obviously we made some corrections, we tried to bring in players that could give some other things, we tried to understand … I don't know if it's clear from the outside, but the pitch is absolutely horrible to play football. It was very slippery, difficult to handle for players on their feet so that didn't help."
Sundowns are next in action in the semi-finals of the MTN8 against Orlando Pirates on Saturday.
Mamelodi Sundowns claimed a deserved 2-0 victory over AmaZulu FC in their Betway Premiership clash at Loftus Versfeld Stadium, with second-half strikes from Iqraam Rayners and Tashreeq Matthews.
Thapelo Maseko has seemingly issued a come-get-me plea to potential suitors after finding himself unwanted at Mamelodi Sundowns.
Mamelodi Sundowns will be looking for their first victory of the 2025/26 Betway Premiership season against AmaZulu at Loftus Versfeld Stadium on Tuesday.
Chippa United coach Sinethemba Badela was delighted with his side's performance in their 1-1 draw with reigning champions Mamelodi Sundowns on the opening day of the new Betway Premiership season on Saturday.
