Chelsea and Arsenal are on track to qualify for the semi-finals of the Europa League.
The Blues beat Slavia Prague 1-0 in their quarter-final first leg thanks to a late goal from Marcos Alonso.
Meanwhile the Gunners' won their quarter-final firs leg tie with Napoli 2-0 at the Emirates Stadium.
Elsewhere Valencia beat Villarreal 3-1 while Benfica took control of their Europa League quarter-final tie with Eintracht Frankfurt by winning 4-2.

Gadecki, Peers win Australian Open mixed doubles title
De Kock demolition leads S Africa to T20 series win over West Indies
Lyon top Europa League standings, Roma through to last eight
World Cup winner, Olympic champion Dunn announces retirement
Pakistan win after all-rounder Ayub sinks Australia