Belhadj may be sidelined for the rest of the campaign with an ankle injury, while O'Hara is fighting to recover from a back problem in time for Pompey's FA Cup Final date with Chelsea on May 15.
Hassan Yebda and Papa Bouba Diop (both knee) continue to be used sparingly by Grant as he nurses his injury-hit squad through to their Wembley showpiece.
Academy starlets Lenny Sowah, Joel Ward and Matt Ritchie could be involved against the Black Country outfit.
Pompey (from): James, Ashdown, Mullins, Piquionne, Brown, Kanu, Basinas, Vanden Borre, Mokoena, Rocha, Smith, Hughes, Utaka, Sowah, Ward, Wilson, Ritchie.
