Mansfield produced a smash-and-grab performance to snatch a 1-0 win at Newport thanks to substitute Reggie Lambe's late strike.
The Stags survived a host of heart-stopping moments in a match dominated by the home side.
But winger Lambe was the hero when he swept home the winner in the 87th minute.
Even though the hosts dominated the possession, Newport goalkeeper Joe Day was the first-half hero.
The former Peterborough keeper denied a close-range Simon Heslop header before keeping out Billy Kee's effort...