Valon Behrami has challenged his West Ham United team-mates to "do something special" by winning at Chelsea on Saturday.
The Switzerland midfielder was part of the Hammers team that drew 1-1 at Stamford Bridge last season - and the No21 is desperate to go one better by securing a victory over Carlo Ancelotti's team.
To do so, West Ham will have to secure their first away success in 14 matches, having not won on their travels since beating Wolverhampton Wanderers on the opening day of the Barclays Premier League season.
However, Chelsea were beaten on their own patch in their last home league fixture - going down 4-2 to Manchester City - and Behrami has called on his colleagues to be at their very best, both mentally and physically, this weekend.
"The approach has got to be different from the last game [a 2-1 defeat by Bolton Wanderers]. Already, when you play teams like this [Chelsea] it's going to be different, but after Saturday we need to do something special like go away and win the games.
"We can do something special, I think, but we all have to be at 100 per cent and be at 100 per cent mentally and physically. That is not so easy, because if anybody doesn't give 100 per cent, we can't win the games.
"We have time. Every time, you have time, but we have had a lot of chances to get out of this situation and we didn't do it, so now the time is shorter. We have a few other home games and that's where we have to change our mentality."
Behrami believes West Ham must go to Chelsea believing they can beat them, insisting that a positive mindset is vital to achieving a positive result.
"For me, I think it's going to be mentally hard. Physically, I'm sure the statistics will show that we ran more than the other team, but really the big thing is the mentality. With this team last year, without three or four players, we would go and play and play very well and get some good results. It's now just in our minds, as our attitude can change everything."
Looking back on Saturday's defeat by Bolton, Behrami echoed the sentiments of manager Gianfranco Zola that a slow start - Kevin Davies and Jack Wilshere put the Trotters 2-0 up within 16 minutes - had scuppered the Hammers' hopes.
"It was a big disappointment for us because we didn't expect this performance. We didn't prepare for the game like this and it was one of the worst games we have played under Mister these last two years. I'm very disappointed because we've lost a big chance and now it's going to be hard.
"The way we started, the mentality how we started was poor I think, compared to the Hull City game when we started very well. When you start in the Premier League like we did in the opening 20 minutes, every single mistake will be punished.
"We are really disappointed and now it will be very hard. It was already hard and it will be harder now."