Jermain Defoe scored against his old club to earn Tottenham a point that lifts them out of the Premier League relegation zone on goal difference.
Portsmouth keeper David James, who made a series of superb stops, denied Aaron Lennon seconds before David Nugent put Pompey in front with a deflected shot.
But Luka Modric set up Defoe to drill home an equaliser soon after, and Spurs pushed forward in search of a winner.
Darren Bent should have won it for Spurs but headed wide from close range.
LAST SEASON’S CORRESPONDING GAME
Tottenham Hotspur 2-0 Portsmouth
22 March 2008 – Ref: Phil Dowd
Spurs scorers: Bent 80, O’Hara 82
THIS SEASON’S REVERSE FIXTURE
Portsmouth 2-0 Tottenham
28 September 2008 – Ref: Mike Dean
Portsmouth scorers: Defoe 34 pen, Crouch 68
Sent Off: Diarra (Portsmouth) 88