The Brazilians went down 2-1 to Amakhosi at Loftus Versfeld Stadium on Tuesday.
“Of course we didn’t take the defeat to Kaizer Chiefs very well, we really wanted to win that match but things didn’t go as planned,” Kekana told his club's website.
“Now all that’s important is the match against AmaZulu. We did our match analysis and we know what didn’t work.”
The engine-room enforcer added: “The good that came out of the match is that we created enough goal scoring opportunities and if you create, it means you have a chance to score.
“We face AmaZulu with a painful heart but that won’t get in the way of us focusing on the goal at hand. We need these points very much and our aim is to get all three points.”
Sundowns are minus suspended midfielder Tiyani Mabunda for tomorrow's clash at the same venue following his dismissal against Amakhosi.
Downs are eighth on the Premiership table with nine points from five games - a point more than Usuthu, who lost 3-2 to visiting Polokwane City in midweek.