Marouane Fellaini headed a stoppage-time winner to earn Manchester United a 2-1 home victory in Arsene Wenger’s last visit to Old Trafford as Arsenal manager.
Wenger, presented with a gift by old rival Alex Ferguson before kick-off, rested the likes of Mesut Ozil and Alexandre Lacazette with an eye on Thursday’s Europa League semi-final, naming his youngest league XI since 2011’s infamous 8-2 loss at United.
And the Frenchman’s young side were on track to do him proud, Henrikh Mkhitaryan levelling on his Old Trafford return after Paul Pogba’s early opener for United.
But although United’s attack was depleted by an injury that forced Romelu Lukaku off early in the second half, Jose Mourinho’s men came up with a later winner.
Ashley Young’s inswinging cross from the left was perfect for Fellaini to rise highest in the box to flick home the decisive goal in the second minute of added time.
A sixth successive defeat away from home in the Premier League will be irrelevant if Wenger can inspire a tunraround away to Atletico Madrid as United tighten their grip on second place in the table.