Pedro Rodriguez starred as Chelsea withstood a spirited Slavia Prague fightback in a wild 4-3 victory to qualify for the Europa League semi-finals on Thursday, while Arsenal knocked out Napoli after an assured display in Italy.

Leading 1-0 from last week's first leg in the Czech capital, Chelsea appeared to be cruising towards the last four after an early goal blitz at Stamford Bridge. Pedro struck the opener on five minutes before an unfortunate Simon Deli turned into his own net and Olivier Giroud added a third with barely quarter of an hour gone in London. Tomas Soucek pulled one back for Slavia on 26 minutes, but Spain forward Pedro replied immediately to restore the Blues' three-goal lead.