John Sheridan’s side dropped out of a play-off place on Tuesday night after losing 2-0 away at Dagenham & Redbridge. Stevenage and Newport took advantage to leap-frog above the Pilgrims.
Stevenage sit seventh – the final play-off spot – on 57 points, with eighth-placed Newport on the same points after they beat sixth-placed Luton in mid-week.
Luton are only two points ahead of Argyle, so whoever wins tomorrow’s match at Home Park will be in a good position.
The teams last met on Boxing Day Rodney Parade when Newport won 2-0 thanks to goals from former Greens striker Chris Zebroski and Mark Byrne.
Argyle go into Saturday’s game with just one win to their name from their last five outings. That victory, however, did come in their last home fixture.
Newport have claimed two wins from their last five games, against leaders Burton and play-off rivals Luton.