By Daniel Orme Gareth Southgate is unsure over how severe Kyle Walker’s injury is after his England withdrawal vs Brazil. The right-back started as captain for the Three Lions on Saturday eveningagainst Brazil at Wembley. He lasted just 20 minutes before being forced off of the pitch. Walker had initially picked up what looked to be a hamstring problem after getting back to clear an effort from Vinicius Jr off of the line. He received treatment before coming back onto the pitch. The 33-year-old did not last much longer as he was hauled off in place of Aston Villa star Ezri Konsa. Walker went s…