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The Catalan giants have a steep hill to climb<p>Barcelona tries to become the first team in Champions League history to come back from four goals down in the knockout round when it hosts PSG in the second leg of their round of 16 clash. Follow along with our live blog below.<p><i>For news, stories, results</i> …

Read more at CBS Sports: http://www.cbssports.com/soccer/news/barcelona-psg-aggregate-score-highlights-results-live-blog-champions-league-2017/