Huddersfield Town manager Mark Robins bemoaned his side's lack of consistency after last week's high-scoring victory was followed by another disappointing defeat in the Sky Bet Championship.
After the elation of a 5-0 home defeat of Barnsley came the dejection of a 2-0 setback at Doncaster and Robins sa id: "We just seem to go from the sublime to the ridiculous.
"We did have a spell at the start of the game but it didn't last and in all honesty we didn't look like scoring.
"We just didn't have any teeth and it pains me to say it but they have caught us and seem to want it more.
"We had well over 2,000 supporters here today and we had to do better for them than that.
"Fortunately we've got a game midweek where we can put it right. The players are capable but we have to do better if we are going to move forwards.
"I don't know whether it's a feeling of safety being mid table but we can't keep winning one week and losing the next.
"I thought Doncaster were physically stronger and more up for the game and it's embarrassing for me to sit here and say that."
Huddersfield began at a cracking pace but had no response when Billy Sharp fired the home side in front after Gabriel Tamas had headed down a 28th minute corner.
Town again started well in the second half but faded after Rovers had scored a splendid second goal with David Cotterill slotting home following good work by Chris Brown and Mark Duffy in the 55th minute.
It was a big win for Doncaster following last week's 5-0 defeat at Bournemouth and manager Paul Dickov said: "I expected a response after that and I knew I was going to get one.
"We owed the fans after Bournemouth where we let ourselves and them down and we played like we can do here.
"I said to the players before the game not to leave anything out there and when you have a team willing to run and put their bodies on the line then you are difficult to beat.
"We just need to keep our standards high because we know we are capable of beating most teams when we play like that.
"Nahki Wells can be a handful but I thought our back four was outstanding .
"We had winners all over the pitch and Chris Brown chased everything down and was unplayable up front.
"It was a great team performance but when you have players like that it rubs off on everyone else.
"Billy Sharp scored a great opener for us and that's why we signed him. There wasn't another player on the pitch who could have snatched a goal like that."