By James Cormack It’s all to play for in Catalonia as Barcelona host Napoli in the second leg of their Champions League round of 16 tie on Tuesday night. The two sides, who have endured disappointing title defences in their respective domestic divisions this season, played out a 1-1 draw in Naples three weeks ago. Barca were superior for large swathes of the first leg, but they were pegged back by a smart Victor Osimhen finish. The Blaugrana are unbeaten since Xavi revealed that he’ll be stepping down at the end of the season, but rarely have they produced dazzling displays. They’re trudging a…