Harriers were looking far more dangerous with their new attacking formation and Larkin gave them the lead after 72 minutes, racing on to Broughton's chipped through-pass and lofting the ball over advancing keeper Richardson. Jan Molby - banished from the touchline after protesting too strongly
However, he was injured in the resulting collision with Richardson and had to come off six minutes later with Hadley replacing him.
And boss Molby, seemingly upset with the referee while Larkin was being treated, was subsequently ordered from the dug-out to sit in the stand due to his protests.
Skilful play on the edge of the box by Bennett set the midfielder up for a good effort on goal but a defender got in a telling deflection which forced the ball over the bar.
Doncaster sent on Tierney for Watson on 75 minutes and then Barnes came on for Kelly nine minutes form time.
Harriers were impressively holding off any attempt from the home side to equalise and Hadley forced Richardson into a diving save three minutes from time after a forceful run.
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