Nigel Davies admitted his forwards were not good enough after Gloucester slumped to a 29-12 Aviva Premiership defeat to Exeter at Kingsholm.
The Chiefs' pack was on top throughout as fly-half Gareth Steenson's 19-point haul with the boot ultimately made the difference in a one-sided West Country derby.
Players like try-scorer Dean Mumm, No 8 Dave Ewers and hooker Chris Whitehead all excelled as Gloucester's big men were overpowered in front of their home fans.
"As a pack of forwards, they will be disappointed, and I am disappointed with the way they performed," director of rugby Davies said.
"They were probably outmuscled in most facets, and that unity of the pack needs to come to the fore in the next couple of weeks.
"The pack will put its hand up and say today they weren't good enough and that they were off the pace. It hasn't consistently happened, and I expect a reaction. We've got to man up, front up, particularly in that area.
"Exeter are very good when they have got the ball. They had quick ball and front-foot ball for large periods, and they put us under huge stress. Consequently, they controlled the game."
For Exeter the result was the perfect riposte following last weekend's 21-9 home defeat against Leicester, when their first-half performance in that game came in for considerable criticism.
"The challenge for us was to bring our second-half performance against Leicester last weekend into today's game, and that is what we did. Out attitude was absolutely fantastic," Chiefs head coach Rob Baxter said.]
"It is all about attitude. If you get the attitude right, you can be a handful against any team.
"We started the Leicester game a little bit afraid to take them on because we didn't know whether or not it might put us under more pressure than clearing the ball long against them, whereas today when we made mistakes it was at the end of trying to do something.
"Mistakes will happen, you can live with that, but if you don't fire any shots then you have got to question what you are trying to do. We kept our composure and played a lot of good rugby.
"We had a platform across the team that allowed everyone to play today. We didn't create that against Leicester last week. There were some notable performances from the guys today.
"If you play hard and play fast, you will always have an opportunity to be in the game. A lot came off for us today, and massive credit to the players."