Southampton had looked in control after Jan Bednarek headed in James Ward-Prowse’s corner in the 23rd minute before Ward-Prowse beat De Gea 10 minutes later with a curling free kick.
Browsing: Alex Mccarthy
Giroud muscled and dribbled past three defenders and keeper Alex McCarthy seconds into the second half to poke the ball home from a pass by the ever-busy Eden Hazard.
The match ended on a chaotic note as Stephens saw red for lashing out at Jack Wilshere, who himself earned a yellow card for his part in an injury-time scuffle, while Mohamed Elneny was also sent off for a shove on Soares