Manchester City playmaker David Silva believes the Barclays Premier League champions have got to stop Barcelona scoring if they are to have any chance of pulling off a miracle at the Nou Camp on Wednesday night . Silva and his team-mates are 2-1 down after the first leg of their Champions League last-16 tie and head into the game having been written off by just about everybody . However , the Spanish international believes Manuel Pellegrini 's team can progress if they manage to become only the fifth team — and the first in the competition — to stop Luis Enrique 's team scoring . Manchester City playmaker David Silva believes they have to stop Barcelona scoring to have a chance . Silva and his City team-mates are 2-1 down after the first leg of their Champions League last-16 tie . It is a task easier said than done to stop Barcelona , led by Lionel Messi , from scoring at home . Messi ( centre ) and co will have something to say about City 's progress when the come to the Nou Camp . 'We need the kind of mentality we showed in the games against Roma and Bayern Munich in the group stages , ' Silva said . 'The most important thing is not to concede a goal because obviously things then become more difficult . 'Strange things can happen . Everybody wrote Schalke off before they played Real Madrid but they won 4-3 and could have scored again which would have put them through . Nobody predicted that . 'Not many thought PSG could beat Chelsea , especially with only 10 men for so long , so I know that everything can happen , not only in the Champions League but in every game . 'Everyone is expecting Barca to go through but hopefully we can give a strong performance and we do n't have any kind of pressure on us because we are behind and playing away . ' Silva is preparing to face Barcelona with his City team-mates on Wednesday night at the Nou Camp . Silva feels City can progress if they can stop Barcelona from scoring against them in the last-16 tie . City travelled to Spain at this stage last season , having lost the home leg 2-0 . This time they are slightly better off following Joe Hart 's last-minute penalty save from Lionel Messi at the Etihad Stadium three weeks ago . 'We played well in the second leg against Barca last season and played with freedom so we will see , ' added Silva . Revered in Spain , where he played for first Celta Vigo and then Valencia , Silva has long been coveted by Barcelona and indeed Real Madrid . The 29-year-old has insisted , however , that he is n't thinking about a move away from City and has enjoyed playing further up the field under Manuel Pellegrini this season . ' I have played closer to the box in a more advanced position this season and that 's why I 'm scoring goals , ' he said . Manuel Pellegrini will look to perform a miracle on Wednesday night against a powerful Barcelona side . 'It 's more about the team than individuals . If we are good as a group we can make the difference . I always have freedom in the pitch but now we need all the players at their best if we are to go through . ' I have four more years on my contract and I 'm very happy here — I have always said that . The way the supporters are with me is something I 'm very proud of and it inspires me to play my best and I 'm humbled to have that kind of appreciation every time I play . ' City will train at their own base in Manchester on Tuesday morning before flying to Barcelona early in the afternoon .
Manchester City face Barcelona on Wednesday night at the Nou Camp . Barca feels City must stop David Silva from scoring in the second leg . City are 2-1 down after the first leg of the Champions League tie .