The Bluebirds head into the weekend in the relegation zone, six points adrift of safety.
The manager told reporters: "We're got to believe in it and give 100%. The lads have shown that belief this week and will go into the game on Saturday with the fight needed to get a result.
"I hate losing, I don't like losing. It's about getting the job done for Cardiff City, the players, the fans, everyone.
"I've got absolutely no reason to doubt any of my players. Their professionalism, loyalty and integrity is there. Saturday will be tough, but we're ready for it."
Cardiff have won just one of their last nine matches in the Premier League.