Chelsea head coach Antonio Conte accepts that his side face a huge task in trying to reach the Champions League quarter-finals at the expense of Barcelona.
The two teams drew 1-1 at Stamford Bridge in the first leg of their last-16 tie, leaving the Catalans with home advantage for the return leg on Wednesday evening.
We must be very good, but when you play against this type of team, you must be prepared to suffer.Antonio Conte
And Conte is well aware of the need for a top-drawer display, having called the Blues' first-leg performance nearly perfect.
He told the club's official website: "We must be very good, but when you play against this type of team, which I think is one of the best in the world, you must be prepared to suffer - in the same way we did in the first leg, where we were almost perfect.
"This is not a (Chelsea) team with great experience, we have a lot of players who are playing their first or second season in the Champions League.
"But we have to work as a team and try to be ready to suffer the moments we have to suffer, and in every moment we have to know that we can have a chance to score.
"Given our opponents' ability to dominate possession, we will also need to show plenty of patience and concentration in waiting for our opportunities and making the most of them when they arrive."
The Blues have drawn on each of their last four visits to the Camp Nou, with two of those games ending 2-2, a result which would be enough for Chelsea to qualify for the last eight.
A 2-2 full-time draw on Wednesday is priced at 18/1, while Barca are 6/1 to win 2-0 in 90 minutes and 6/5 to keep a clean sheet.
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