Arsenal and Chelsea could be each other’s biggest competition for a place in the final, which takes place on Wednesday, 29 May at the Olympic Stadium in Azerbaijan’s capital Baku.
Gunners’ boss Unai Emery won three Europa League titles in a row with former club Sevilla – the Spanish side are a record five-time champions but were knocked out in the last 16 by Slavia Prague.
Italian side Napoli, who dropped down from the Champions League, could be a threat after they picked up a 1-0 win over Liverpool in Naples in October.
They could be drawn against their former manager Maurizio Sarri, who is now in charge at Chelsea. Arsenal made it through to last season’s semi-finals before losing 2-1 on aggregate to Atletico Madrid.
The last time the two English teams met was in the Premier League in January and Arsenal won 2-0. Chelsea won the reverse fixture at Stamford Bridge 3-2 in August.
Europa League quarter-finalists
|Chelsea (Eng)||Napoli (Ita)|
|Benfica (Por)||Eintracht Frankfurt (Ger)|
|Valencia (Spa)||Slavia Prague (Cze)|
|Arsenal (Eng)||Villarreal (Spa)|