By Jude Summerfield Erik ten Hag refused to confirm whether a new contract has been discussed during talks with Manchester United’s new investors and says he still needs to prove himself to Sir Jim Ratcliffe and INEOS. The Dutchman’s second season at Old Trafford has been chaotic, exiting Europe while sitting in eighth in the Premier League. The FA Cup is their only remaining and realistic chance of silverware this season, with a trip to Newport to come later on Sunday, and Ten Hag will have 12 months left on his deal when the summer arrives. He said: “We speak about many subjects but I can’t …