Giroud came on as a late sub against Sunderland and scored off his first touch.
And then he scored again off his second touch.
Sanchez had put Arsenal 1 – 0 up at half time.Jermaine Defoe gave Sunderland a glimmer of hope when he scored off a penalty to bring them level.
Then the bearded Giroud was brought on and he turned the game around with two quick goals.
Sanchez – who was running around tirelessly for most of the game scored another a little later.
He has scored 50 goals for Arsenal now.
Joy for Wenger but despair for Moyes – Sunderland is stuck at the bottom of the heap and showing no signs of going anywhere.
Highlights..