By Matthew Cooper The semi-finals of the FA Cup are set to take place at Wembley next month and Manchester United’s clash with Coventry City has been brought forward due to concerns from the Metropolitan Police. In the first semi-final, Manchester City will face Chelsea at 5.15pm on Saturday, April 20 before United take on Coventry at 3.30pm the following day. The Football Association (FA) are said to have requested a 4pm kick-off, but they have now agreed to move the match after talks with police. According to the Daily Mail, the match was viewed as ‘high-risk’ by the police, with the FA and …