The ‘injury-prone’ tag can be a difficult one to shake. Ianis Hagi is finding that out the hard way, interest seemingly in short supply for a player who’s reputation has never really recovered since suffering a serious knee issue two-and-a-half years ago. And when Rangers confirmed the signing of Vaclav Cerny last week, there may have been some sections of the Ibrox fanbase who’s excitement was tempered by the fact the Wolfsburg loanee had spent a long spell on the sidelines himself with an ACL tear of his own. Cerny missed a year of action between 2017 and 2018. He spent a similar spell on th…