Martin O'Neill offered no excuses after seeing his Aston Villa side beaten 2-0 by a well-drilled Wigan outfit on the opening day of the Barclays Premier League season.
Goals from Hugo Rodallega and Jason Koumas handed the Latics victory in front of an expectant Villa Park crowd, the majority of whom vented their frustration at the home side's performance at the final whistle.
Asked if he had been left frustrated by his team's display, O'Neill replied: "Well, more disappointment. You can be frustrated if you feel that you deserved something out of the game, but we didn't.
"After the initial 15 minutes, we were second best all afternoon. You can analyse everything but at the end of it all I thought we looked tired, which was a wee bit of a surprise considering we've had a pretty decent pre-season.
"We've been beaten when we should have been ready to go, and it was very disappointing indeed."
O'Neill also felt the boos at the final whistle from many in the 35,578-strong crowd were largely justified, adding: "That's my responsibility, it's as simple as that. If you pay your money, you can criticise as you see fit."