Yaya Toure believes Manchester City will have to be wary of trying to 'run after the score' as they look to overturn a 2-1 Champions League last 16 aggregate deficit against Barcelona on Wednesday. Former Liverpool striker Luis Suarez scored twice in the first leg last month before Sergio Aguero gave City a ray of hope to take into the Nou Camp, but Toure admits his side must remain calm during the early stages. Speaking to Nissan, the official automotive sponsor of the UEFA Champions League, Toure said: 'It is always difficult to play against Barcelona when you have to run after the score. Yaya Toure (left) and Sergio Aguero arrive at Manchester airport ahead of their flight to Barcelona . Joe Hart (left) and Vincent Kompany will know keeping a cleansheet at the Nou Camp will be crucial . 'But in football anything can happen, we have our chance and they have their chance as well and we will see on March 18.' Despite the daunting task of having to beat Luis Enrique's side by two clear goals in order to qualify, Toure, who will be returning to action after a three game European suspension, insists that City have the players to pull off the feat. He added: 'We have got a few fantastic players at City and I think it is a 50-50 game because they won [the first leg] 2-1.' City boss Manuel Pellegrini will be hoping his side can record a memorable night in Barcelona . Frank Lampard (left) and Samir Nasri make phone calls shortly after getting of the team bus . Aguero arrived at Manchester airport slightly later than the rest of his City team-mates . Toure believes City must be wary of trying to 'run after the score' against Barca on Wednesday . The City players are put through their paces on Tuesday before boarding their flight to Barcelona . Toure was speaking to Nissan, the official automotive sponsor of the UEFA Champions League, as part of his role as the car manufacturer’s global ambassador.
Yaya Toure believes Manchester City must remain calm during Champions League last 16 clash against Barcelona . City are looking to overturn a 2-1 first leg deficit at the Nou Camp . Toure admits City mustn't 'run after the score' on Wednesday night . Sergio Aguero's strike gave City hope going into the second leg . CLICK HERE for all the latest Manchester City news .