Barcelona boss Luis Enrique has called Tuesday's Champions League clash against Roma "vital" as the Catalan club attempt to secure first position in Group E.

Victory for the Spanish giants at Camp Nou would ensure that they top the section, although they could lose against the Italian side and still be in pole position entering the final group match.

Enrique has said that the clash against Roma is "very important" and hopes that it is "more open" than the reverse match in Rome, which finished 1-1.

"It's vital that we top our group, therefore [Tuesday's] game is very important. I hope it's more open than the first match," Enrique told reporters.

Barcelona are attempting to become the first team in the modern era to successfully defend the Champions League.