The Europa League round of 32 was concluded last night around Europe.
Chelsea (ENG), Napoli (ITA), Valencia (ESP), Frankfurt (GER), Benfica (POR), Slavia Prague (CZE), Arsenal (ENG) and Villarreal (ESP) are the eight teams left in the competition.
Arsenal overcame a 3-1 defeat to Rennes in the first leg, to secure a 3-0 victory at the Emirates Stadium on Thursday night.
Chelsea had a more comfortable path to the quarter-finals, as they followed up a 3-0 win over Dynamo Kyiv at Stamford Bridge, with a 5-0 win in Ukraine on Thursday.
Both Premier League sides could face each other in the last eight of the Europa League, as the draw is now open and teams are no longer seeded or protected from playing another side from the same country.
Napoli are the only Serie A left, following Inter's 1-0 defeat to Eintracht Frankfurt at San Siro.
Valencia have booked their place following a 1-1 draw with Krasnodar, but Sevilla crashed out to Slavia Prague in extra time.
Benfica also needed extra time to see off Dinamo Zagreb with a 3-0 victory in Lisbon.