Joe Murphy has also urged the City side to respond to the loss in the right way...
Coventry City goalkeeper Joe Murphy believes City's performance during the 2-0 loss to Brentford was 'the worst we've played'.
The Sky Blues suffered a difficult afternoon, losing their unbeaten Sixfields record as the Bees secured a comfortable victory.
Clayton Donaldson and Martin Taylor netted either side of the break, a result which City are in the League One relegation zone after the weekend's fixtures.
The Irish keeper had to pull off a string of impressive saves to deny Brentford further and he expressed his disappointment after the game.
Murphy said: "We did well in the opening stages, in fact, we controlled the first ten minutes. But after that, we didn't get anywhere near those expected levels.
"They seemed to grow into the game and we struggled to play the football we usually do and that was really disappointing. I think it is the worst we've played this season.
"Teams have watched us now and they raise their game to play us as they have seen our results so far. We need to make sure we raise our levels again and work on aspects in training.
"The two goals we conceded were really poor from a defensive point of view and we didn't create many chances in response to that."
Coventry have had impressive form at Sixfields so far, recording impressive wins over Bristol City, Gillingham and Colchester United.
Murphy continued: "When we do well, other teams will raise their game against us. We need to deal with that and keep the spirits high at the same time.
"They are a good side but we gave them far too much space and that was really disappointing. We have got a young dressing room so we need to make sure we learn from defeats like this.
"We have shown plenty of energy already this season and we need to make sure we respond to this loss in the right way."