By Tom Gott Kobbie Mainoo has admitted his delight at hearing the news that Erik ten Hag will remain Manchester United manager. Ten Hag survived a lengthy post-season review by new United co-owner Sir Jim Ratcliffe and is now in talks over extending his contract at Old Trafford. While Ten Hag has faced plenty of criticism over the past 12 months, one area in which he has received widespread praise is his faith in 19-year-old Mainoo, who quickly established himself as a key member of the United first team last season. Mainoo’s performances for the Red Devils were so impressive that he earned up…