Bath boss Ian McGeechan admitted his team had been "pretty average" as they slumped to a 7-16 Premiership defeat against Worcester at Sixways on Friday.
Andy Goode's late drop-goal denied Bath a losing bonus point when victory would have taken them into the title play-off zone.
"We didn't have a lot of ball in the first half and that is not the best way to build pressure," McGeechan said.
"We didn't show the intensity of last Sunday [against Montpellier]. We were pretty average and we have no excuses.
"Things have to be far better than they were. We have to look hard at ourselves. We did not do ourselves justice."
The result meant former England captain Lewis Moody ended a difficult week in more pain as tepid Bath slipped to defeat without seriously testing a Worcester side that had won just two of eight previous league games this season.
Moody, his trademark all-action style making little headway in a Bath side devoid of ideas, lasted only 49 minutes before injury forced him off. And to complete a miserable match for Bath, their England lock Dave Attwood was carried off with his neck in a brace following a lengthy stoppage midway through the second period.
Attwood went to hospital as a precaution, but he was expected to be released tonight after medical staff gave him the all-clear. Moody, meanwhile, finished second-best after attempting to tackle Worcester wing Marcel Garvey just before half-time, departing for treatment to a head wound before making a brief return that he eventually aborted.
Bath skills and defence coach Brad Davis added: "Worcester played the game in the right areas and deserved their win. We can't be up one week, and then not the next. If we want to be in the top four in the Premiership, then these are the sort of places we have got to come to and get four points."
Worcester also suffered their share of injuries during a bruising battle, with prop Matt Mullan hurting his shoulder and flanker Neil Best suffering a suspected broken arm.
"We have now only got two fit props, so it was a bit of a costly game for us," Worcester head coach Richard Hill said. "But to get the win will give everyone a big boost. We asked for our best performance of the season and I think we probably did that.
"We didn't look jittery. We went out with confidence, although we didn't get the rewards until just before half-time with Miles' try. We managed to close the game out, which was key. That was a big psychological thing for us - a massive step forward."
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