West Ham United midfielder Valon Behrami believes there needs to be a change in attitude if Gianfranco Zola's side are to avoid relegation this season.
A recent good run of form was abruptly ended by the home defeat to Bolton Wanderers at the weekend, a result that left the Hammers embroiled in a battle to avoid the drop.
Switzerland international Behrami said: "It was deeply disappointing for us (against Bolton). It was one of our worst games with Mr Zola in the last two years. We lost a big chance.
"If you look at the statistics, we run more than other teams - but the big thing is our mentality. So it is on our mind and our attitude. When you make technical mistakes you can work on them. Easy. You just keep working hard.
"But the problem is bigger when it is mental. It is very difficult to work on that. Time is running short. We have to change something as the situation now is not good for us.
"We can do something special but we have to all play 100 per cent. Every player needs to give 100 per cent mentally and physically. That is not so easy. If only one player gives 80 per cent we can't win the game. It was already hard and now it will be harder still."