The Nigerian took advantage of a defensive error by David Summiel allowing Yakubu to shrug off Distin and slot past the City keeper.
The game itself was quite tepid and Portsmouth seemed on course for a deserved win over a City team seemingly bottling the occassion in front of over 48,000 fans, until Sommeil headed in an injury time equaliser from a Joey Barton free-kick.
Team: Hislop: De Zeeuw, Schemmel, Stefanovic, Zivkovic, Berger (Harper 82), Faye, Stone, Quashie, Sheringham (C), Ayegbini (Pericard 74)