Wayne Rooney admitted Derby deserved a 1-0 defeat to Championship relegation rivals Rotherham in his first match in permanent charge at Pride Park.
Jamie Lindsay fired home four minutes from time as the Millers’ moved above Derby, who slip to second bottom of the table.
It was far from an ideal start to his reign for the former Manchester United and England captain, who gave an honest assessment of side’s underwhelming performance.
“Today Rotherham outfought us,” said Rooney.
“Our quality on the ball and our concentration levels weren’t where they should be.
“That’s the disappointing thing and, if I’m being honest, I don’t think we deserved anything from this game.