Arsenal made it 11 straight wins in all competitions thanks to Danny Welbeck's winner, as the Gunners beat Sporting 1-0 in Lisbon on Thursday in the UEFA Europa League.
Ruben Loftus-Cheek netted a hat-trick for Chelsea in a comfortable 3-1 win over BATE Borisov at Stamford Bridge.
It was also a good night for the Spanish sides in the competition. Real Betis beat AC Milan 2-1, Sevilla thrashed Turkish side Akhisar, and Villarreal put five past Rapid Vienna.
Europa League Results
FC Zurich 3-2 Bayer Leverkusen
AEK Larnaca 1-1 Ludogorets
RB Salzburg 3-0 Rosenborg
RB Leipzig 2-0 Celtic
Zenit St.