Leicester City boss Nigel Pearson blasted his players after their Capital One Cup defeat to Shrewsbury.
Andy Mangan, a free-transfer signing from Forest Green Rovers during the summer, scored the only goal of the night at the King Power Stadium to send the League Two Shrews into the third round.
Pearson made eight changes from the team beaten 2-0 at Chelsea at the weekend, handing debuts to four players, including three youngsters.
Pearson pulled no punches in his condemnation of a wretched display far below Premier League standard.
"It was not a good performance, but I'd like to congratulate Shrewsbury Town because they probably played well enough to win the game," said Pearson.
"We didn't do enough throughout the entirety of the game to progress in the competition, so I'm very disappointed.
"We had a number of players making debuts, and players starting who have not figured in the Premier League games so far.
"But it was a performance best forgotten in many ways. It shows you that how we applied ourselves in the first two Premier League games, that has to be the baseline.
"But tonight wasn't good enough. We lacked quality, yet the players out there should be good enough.
"If they are good enough, then it (the defeat) had to be about the approach to the game and the application. It can't be anything else."
