Arsenal and Chelsea have both progressed to the Europa League semi-finals.
The Gunners went into their away game at Napoli, holding a 2-0 lead.
They extended that aggregate advantage in southern Italy as Alexandre Lacazette's free-kick sealed a 1-0 win.
Unai Emery's side now go on to face Valencia, who beat Valencia 2-0 at the Mestalla.
Valencia had already beaten Villarreal 3-1 in the away leg.
Fight Back
Chelsea held a 1-0 lead over Slavia Prague heading into tonight's second leg in London.
The Blues raced into a 4-1 lead over the Czech side with Pedro's brace the main contribution, along with Olivier Giroud and an own goal.
Slavia staged a second half fight-back however, through Petr Sevcik's double to leave the final scores at 4-3.
Maurizio Sarri's side now go on to play Eintracht Frankfurt.
The Bundesliga side had lost 4-2 at Benfica last week. But a 2-0 win tonight in Germany put Eintracht into the semis.
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