Chelsea hammered their London rivals Arsenal 4-1 to win the Europa League thanks to two goals from Eden Hazard, possibly making his last appearance for the Blues, and one apiece for Olivier Giroud and Pedro.
Manchester United remained distant spectators in the Premier League title race but at least showed plenty of spirit as they twice responded to going behind to draw 2-2 with in-form Arsenal at Old Trafford on Wednesday.
New Arsenal manager Unai Emery says, he respects Mesut Ozil's decision to retire from international football due to what the German midfielder says is "racism and disrespect" because of his Turkish roots.
Arsenal scrape into the last 16 of the Europa League despite a 2-1 second-leg defeat by Ostersunds, but football was marred by violent clashes at the match between between Athletic Bilbao and Spartak Moscow which left a police officer dead.
Mesut Ozil scores as Arsenal ease to a 3-0 victory at Swedish minnows Ostersunds in the first leg of their Europa League, last-32 tie, while Michy Batshuayi snatches Borussia Dortmund a dramatic win over Atalanta.
Chelsea waste a chance to take control of their League Cup semi-final against Arsenal as the misfiring Blues were forced to settle for a 0-0 draw while Arsenal manager Arsene Wenger welcomes the use of VAR.