The Red Devils registered their biggest win of the 2020-21 Premier League campaign, with Southampton having been reduced to nine men by the end of the mid-week clash after Alexandre Jankewitz and Jan Bednarek were both sent off.
Both Manchester United full-backs combined to end 10-man Southampton’s resistance in the 18th minute when Shaw found Wan-Bissaka at the back post to allow the right-back to score his first league goal at Old Trafford.
Marcus Rashford doubled the home side’s lead seven minutes later before Bednarek netted an own goal in the 34th minute.
Shaw registered his second assist of the Premier League clash when the England international teed up Edinson Cavani to score his fifth goal of the 2020-21 season before the break.