Declan Rice and Gabriel Jesus' stoppage time goals ensured all three points stayed in London as Arsenal beat Manchester United 3-1 at the Emirates.
Marcus Rashford opened the scoring for United in the 27th minute with an excellent finish after being set away by a Christian Eriksen through ball.
Arsenal's reply was instantaneous as Martin Odegaard stroked home a flowing team move just 35 seconds later.
It was £105m man Declan Rice who won it for Arsenal, smashing a deflected effort past Andre Onana from a corner, before Gabriel Jesus was sent racing away to calmly finish and put the cherry on the Gunners' cake.