• Wilshere 'out for at least another two weeks', says manager
• Training injury rules out Abou Diaby for up to nine months
Arsène Wenger has warned England not to place too much pressure on Jack Wilshere, whose return to the Arsenal team has been delayed by another two weeks with the ankle injury that led to him missing the World Cup qualifiers against San Marino and Montenegro. England's 1-1 draw with Montenegro on Tuesday had been partly attributed to the midfielder's absence but Wenger was quick to stress that a country's success does not depend on one player.
Roy Hodgson admitted that England missed Wilshere, who was their best player in the friendly victory over Brazil last month, after they were held by Montenegro. However, Wenger believes it is important not to expect Wilshere, who will resume training on Monday, to be the difference between success and failure.
"The country doesn't depend on one player, no matter how good he is," Wenger said. "I believe the quality of a country is the number of good players they have. Jack is a fantastic player but it would be too much pressure on him to say England's future depends on him. The other night [David] Silva didn't play for Spain in France and on the bench you had [Juan] Mata, [Santi] Cazorla and [Cesc] Fábregas, and that is what you want to see from big football countries, that it doesn't depend just on one player.
"What people forget about Spain, and what they do not talk enough about, is the big advantage of a good national team is when it is based on two teams. In the starting line-up of Spain you have many times seven players from Barcelona, three or four from Real Madrid. The other night [Nacho] Monreal was the only player who was not from Barcelona or Real Madrid.
"That is a massive advantage when you go into a game like that because you can play like a club. If we can have four, five or six at one club, it will become a massive advantage for England. At the moment all of these players are spread everywhere. To look like a good team you have moments where you play well for one half, then suddenly something disappears and you have no team any more because the players come from too many clubs."
Wilshere, who has missed Arsenal's past two matches after a scan revealed inflammation to his left ankle, had been expected to be fit for the visit of Reading on Saturday, but his return has been delayed after it was decided that he needs to be treated with extra care. Instead Wilshere, whose last appearance came in the defeat at Tottenham on 3 March, should return against Norwich City on 13 April.
While this injury is not thought to be serious, the memory of Wilshere spending 17 months on the sidelines with a stress-fracture to his right ankle means that Arsenal are not willing to take any chances on him. Although he will start running again on Monday, next Saturday's game at West Brom is deemed too soon for a return.
"We will rest him when it is needed," Wenger said. "He has regular scans and as soon as we have an alert we will respect it no matter what is at stake. He had a difficult moment, of course, when you told him, because he didn't feel any special pain. But he knows he has to take care of his future. Because he is a very young player, I think he accepts it.
"It's not better or worse. It was an inflammation of his bone and we had such history with him that we are a bit more cautious than we would be with you or with me. We deferred his rehab by one week. We gave him one more week's rest because it was wise medically to do it. He will start his first run outside on Monday."
Although Arsenal have coped well without Wilshere, winning at Bayern Munich and Swansea City, Wenger is concerned about them being left short in midfield. Wenger said Theo Walcott will be out for another six to 10 days with the groin injury he suffered during England training last week. Kieran Gibbs is also struggling with flu.
There were more injury problems for Wenger after Abou Diaby tore his anterior cruciate ligament in training and is expected to be out for around eight to nine months.
A club statement said: "Abou Diaby injured his left knee in training on Wednesday and subsequent scans have confirmed that he has torn his anterior cruciate ligament. Following consultations with specialists, Abou will undergo surgery to repair the injury in the near future."