By Jude Summerfield Casemiro is in danger of being dropped from Manchester United’s starting XI for Saturday’s FA Cup final against Manchester City. The Brazilian midfielder has suffered a dramatic loss of form in recent weeks, coinciding with manager Erik ten Hag’s forced decision to play him at centre-back due to mass injuries in that position. However, Lisandro Martinez and Raphael Varane are expected to feature in central defence in the absence of Harry Maguire, while Victor Lindelof is also back in training. According to The Athletic, the Red Devils have prepared for the FA Cup final with…