Darren Ferguson said we was left 'bored to tears' by a lacklustre South Yorkshire derby which saw his Rovers side beaten by Sheffield United.
Che Adams scored the only goal of the game just before half time to condemn Rovers to their fifth consecutive game without victory, a result which leaves them only six points clear of the League One relegation zone.
Ferguson - who watched from the Keepmoat Stadium control box due to his touchline ban - admitted he felt the need to apologise to supporters for the lifeless performance from his side.
"I would have to say I have to apologise to the fans for that, because I would not be happy if I'd watched that," Ferguson said.
"That is not what I have come to expect from my team. It's something that needs to be sorted out quickly.
"I can't defend that performance. It was the complete opposite of what I wanted.
"Quite honestly I was completely bored to tears by the game.
"It was a surprising performance from us. There was no tempo, no energy, no quality, no composure.
"We had one or two maybe half things but it was a really off day.
"It was probably the worst performance since I've been here, on a big day like this.
"It was one of the most boring games of football, certainly a derby, that I've ever seen.
"It wasn't even like a derby, there were no tackles and atmosphere."