Doncaster manager Sean O'Driscoll felt his side's 3-0 defeat at Cardiff was their "worst performance" of the past two seasons.
Goals from Michael Chopra and Jay Bothroyd sealed Cardiff's second home win in a week before substitute Eddie Johnson netted his first goal for the club to complete the rout.
O'Driscoll said: "That was the worst performance by the team not just for this season but last season as well. We didn't start well and in all areas we were second best."
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