Mikel Arteta calls for immediate Arsenal improvement at Aston Villa

• Captain admits that his side were poor in Dortmund defeat
• Jack Wilshere should be fit for Saturday’s game at Villa Park

Mikel Arteta has laid bare the frustration of Arsenal’s dismal Champions League defeat at Borussia Dortmund, saying that the team did everything wrong and they will win nothing on such form.

The captain felt the pain of the 2-0 loss – a scoreline that greatly flattered Arsenal – and he has called for an immediate improvement. Arsenal travel to high-flying Aston Villa in the Premier League on Saturday.

The only crumb of comfort was the positive injury update regarding Jack Wilshere. The midfielder sparked alarm towards the end of the Dortmund match when he needed treatment to his right ankle. At one point it looked as though he would have to come off, even though Arsenal had used their three substitutes.

But Wilshere carried on and, afterwards, he said that the ankle “feels fine”. The players had the day off on Wednesday and Wilshere will be assessed at the club on Thursday. But the early indications are that the problem is not serious and he should be fit for Villa.

“If you make the mistakes that we did [in Dortmund], against top sides, we know that there is no chance to win the Champions League,” Arteta said. “We have to react. We have to analyse what we have done wrong and try to improve. The best thing is that we have another game against Villa.

“There was a draw between Galatasaray and Anderlecht [in the other game in Arsenal’s group] but we need to recover from our result. We know that Dortmund is one of the toughest places in Europe to come and we’ve seen Real Madrid get battered here as well [4-1 in the 2013 semi-final]. Most of the teams struggle here but we had a different game in mind before the start.”

Arsenal knew that Dortmund like to press aggressively and counter at pace, and they were aware of the importance of keeping errors on the ball to a minimum, particularly as Wenger played with his full-backs high and four attacking midfielders. But Arsenal were careless in the extreme to invite Dortmund on to them.

“We encouraged them by giving the ball away so many times in very difficult positions when the team was open,” Arteta said. “I am very disappointed because we knew their strengths, what we had to avoid and what we did was encourage them to play the way they wanted. They broke on us five or six times in the first 10 minutes when we gave the ball away. It’s not good enough. The accuracy when we were taking the ball and trying to play was missing.”

Paul Lambert, the Villa manager and former Dortmund player, and Tom Fox, the Villa chief executive, who had previously worked at Arsenal, were in the crowd at the Westfalenstadion on Tuesday. They would have seen nothing to worry them.

“We have to bounce back quickly,” Alex Oxlade-Chamberlain, the Arsenal midfielder, said. “If we believe in ourselves as title contenders this year, we have to go to Villa with the belief that we will win the game. That is what we are going to do.”

The right-back Mathieu Debuchy wrote on Facebook on Wednesday night that he had a “broken ligament” in his damaged ankle and would discover on Friday whether he needs surgery.