Wenger admits: Our defending was horrendous

Arsene Wenger capped a dismal night for Arsenal by ruling Jack Wilshere out of Euro 2012.

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Gunners boss Wenger blasted his side's "horrendous" defending and Wigan's time-wasting as the Latics pulled off one of the shocks of the season - and then delivered a massive sting in the tail for England.

After complacent Arsenal blew the chance to go eight points clear of Tottenham in the race for third place, Le Professeur revealed: "Wilshere will not play again this season and he will not go to the Euros for sure.

"He is not ready to practise today or next week, he will not be ready for the end of the season. He is devastated - what had kept him going until now was that he had a chance of going to the Euros with England this summer, but that is over now.

"We had a chat about it, his progress is not quick enough. At the moment I have not told the England manager because he is invisible, but the FA know.

"And it's not that I don't want him to play in the Olympics, but that would be the worst idea for us - when a guy has not played for a year, he needs good preparation."

Wilshere, 20, has not played since he sustained a serious ankle injury in the pre-season Emirates Cup last July - and there was a hint of disagreement with his manager's decision as he bared his soul on Twitter last night.

He said: "My ankle is good, just a few niggles and having been out so long I will not be fit enough for the Euros! Gutted, sad, devastated... it's been a test mentally for me this season and it will continue to be tough until I am back out on the pitch."

As Wigan surged five points clear of the drop zone, Wenger's misery was compounded when midfielder Mikel Arteta limped off after just five minutes with an ankle injury - and he could be out for the rest of the season.

Wenger said: "It looks quite a serious one - it wasn't just a little ankle sprain.

"We defended horrendously for the first and second goal. Everybody involved was included for the first and the second goal.

"On top of that we conceded a second goal with 10 men on the pitch. It took us too much time to change and it was absolutely unbelievable.

"After that we had a mountain to climb. I felt in the first half we had enough chances to come back to 2-2, but the second half we dropped our level, we lost our team play, our cohesion and tried too much individually. There was not enough petrol left in the tank anymore.

"We didn't see anyone who could make a difference."

Wenger added: "Chelsea is a massive and vital game for us. We need to recover from the massive disappointment of tonight first, then prepare mentally for the next one."

The Arsenal manager also blasted Wigan's gamesmanship after he let rip at fourth official Kevin Friend and Gunners skipper Robin Van Persie refused to shake hands with opposite number Gary Caldwell in a fractious climax.

Wenger, who stormed off down the tunnel on the final whistle, scowled: "It is disrespectful to people who pay good money to watch the game.

"I congratulate Wigan - they did well, and I can understand that they do it, but it's up to the referee not to let them get away with it."

Wigan boss Roberto Martinez, whose side have now beaten Liverpool, Stoke, Manchester United and Arsenal in their last five games, and been robbed at Chelsea, said: "We didn't win because we wasted time - we won because we deserved it.

"It was a big test for a young side to show such composure and arrogance on the ball, and I was really proud of them."