A quick-fire double from Fermín López and João Cancelo helped Barcelona into the Champions League quarter-finals with a 3-1 win over Napoli while Arsenal needed penalties to get past Porto on Tuesday. Barca came into the game at the Olympic Stadium locked at 1-1 with last season's Italian champions but any nerves were quickly soothed, with Raphinha at the heart of everything. First the Brazil winger cut the ball back for 20-year-old López - yet another Barcelona youth prospect - to bury a cool f