England's 2-2 tie with Switzerland in European Championship qualifying on Saturday marked a fourth successive failure to win at Wembley, its worst sequence in 30 years.
Coach Fabio Capello has admitted that he is dumbfounded over how to coax performances from players exhausted by the draining Premier League season.
Capello claimed that the Swiss were "fresher" and that his team had played "without energy" in slipping to a two-goal deficit.
"It is not just my idea that they are really tired – you can see it on the pitch," Capello said. "We must try to find a solution, but do you know the medicine? It is not the quality. We have got quality. The problem is the energy, not other things. This week they trained really well for one hour, but the game is 90 minutes. We are not so fresh. It was difficult."