The Tigers are currently just three points above the relegation zone, while their Welsh hosts for Saturday are second from bottom.
"Cardiff is a massive game now, especially with everyone at the bottom end picking up points, the Hull Daily Mail reports him as saying.
"We will have to play better than at Brighton.
"I don't know why but it was a bit flat. Maybe more like we did in the final 15 minutes.
"We played the ball into feet and we need to do more of that.
"It caused Brighton problems. I am not sure if that is because they were tired or what. But our movement and ball possession was better."
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