Portugal failed to beat Gabon in the absence of Cristiano Ronaldo and Nani on a frustrating night in West Africa.
Paulo Bento's side fell behind after 33 minutes when Levy Madinda scored a penalty after Silvio conceded the spot kick with a clumsy challenge.
Deportivo La Coruna striker Pizzi responded almost instantly for the visitors when he buried a spot kick of his own just two minutes later.
Gabon thought they had re-taken the lead before the break when Pepe tried to clear a shot off the line.
After initially awarding the goal the referee consulted his linesman and reversed his decision, much to the annoyance of the home crowd.
Portugal went ahead on the hour when Hugo Almeida turned home from close range after a strong run from Silvestre Varela.
Ill discipline came back to haunt Portugal again in the closing stages when Custodio was penalised for blocking a shot with his hand.
Madinda stepped up to convert for the second time and Gabon were able to hold on to claim a famous draw.
Liam Power
