Pompey made it successive draws over the Easter period after being held by Morecambe.
The goalless Fratton affair means that John Mousinho's side are five points adrift of sixth spot with five games remaining.
Reeco Hackett came closest to snatching a winner right at the death after meeting a Denver Hume cross, but saw his header superbly saved by Connor Ripley.
Fans can watch the key moments (top video) or register with iFollow for extended highlights (middle video) and a full match replay (bottom video).
If the full match replay is playing the wrong audio, you can use the settings cog to toggle between home and away commentary.
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