The on-loan midfielder, who was ineligible for the semi-final victory over parent club Tottenham, hopes a pain-killing injection will allow him to play some part at Wembley.
Centre-half Tal Ben-Haim has recovered from a groin problem, Nadir Belhadj and Richard Hughes (both hamstring) should be available, but Aruna Dindane (groin), Marc Wilson (hamstring), Hassan Yebda (thigh) and youngster Lenny Sowah (knee) are all concerns for Pompey.
Kevin-Prince Boateng is almost certain to miss out. The midfielder did not travel with the rest of the Portsmouth squad to London on Thursday and manager Avram Grant says he is unlikely to be available for the Wembley showdown.
"Kevin has not trained this week and, at the moment, he will not play," said Grant.
Hermann Hreidarsson (Achilles) and Danny Webber (knee) definitely miss out with long-term injuries.
Portsmouth (from): James, Finnan, Rocha, Mokoena, Ben-Haim, Mullins, Belhadj, Hughes, Boateng, Wilson, Yebda, Utaka, Piquionne, Diop, Dindane, Ashdown, Kanu, Smith, Basinas, Sowah, Vanden Borre, O'Hara.