Leicester City boss Claudio Ranieri accepted the blame for Wednesday's 5-0 defeat by Porto in the Champions League but felt some of his fringe players missed an opportunity to impress him.
With the Foxes already through to the last 16, Ranieri made 10 changes.
Those he selected struggled to compete with Porto as Leicester suffered the heaviest defeat by an English side in Champions League history.
"I decided to change the team - the result is my fault," said Ranieri.
"I don't regret it, but some players missed their chance."
Leicester had sealed first place in Group G with a game to spare after winning four and drawing one of their previous five games.