Tactical changes pay off to sink Rams By Pete Loosley

=PETERBOROUGH 2 Mason-Clark 52, Ogbeta 83 DERBY COUNTY 0 STAR MAN EPHRON MASON-CLARK PeterboroughStar GameTUSSLE: Derby’s Nathaniel Mendez-Laing, left, is challenged by Posh’s Jack TaylorPICTURE: Alamy DARREN Ferguson’s tactical masterclass helped Peterborough close in on the play-offs, but the manager saluted his players. Second-half goals from Ephron Mason-Clark and Nathanael Ogbeta moved Ferguson’s men to within a point of the top six as Derby’s slump continued. The Rams’ early domi...