Manchester City fans watched on in horror last night as Kyle Walker went off with an apparent hamstring injury during the early stages of England’s friendly with Brazil. The full-back was captaining the side in the absence of Harry Kane, but the 33-year-old had to be withdrawn less than midway into the first-half. Walker went down and received treatment, and then attempted to play on. A few minutes later he was taken off and replaced by Ezri Konsa. Earlier today, £50 million star Walker took to Instagram to check in with fans concerned about his latest injury setback… Manchester City star Kyle…