Pompey remained fourth in the League One table after being held to a draw by Gillingham at Fratton Park.
Sean Raggett headed home for Kenny Jackett's side in the first half, only for Vadaine Oliver to capitalise on a defensive error to level soon after.
The hosts had other chances to score, with Marcus Harness striking the post and Ellis Harrison, Harvey White and Tom Naylor all forcing saves from Jack Bonham.
But Craig MacGillivray was called into action in stoppage-time to deny John Akinde and ensure the contest finished all square at 1-1.
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