Johnstone signs new deal News Posted January 29, 2014 14:37 by Luke Follow @WatsTheMata Manchester United have announced that 20-year-old goalkeeper Sam Johnstone has agreed a new three-and-a-half-year.Johnstone is still yet make a seniorĀ appearance for the club. Posted by Luke January 29, 2014 14:37 More Stories Manchester United Sam Johnstone Comments are closed.