The Ghanian who was introduced with one minute remaining to strengthen his side’s defense during the injury time failed to clear a rebounded ball from the post to score the winner in his own net.
Throughout the match, Ahly had several clear scoring opportunities but struggled to convert them into goals.
Karim Fouad's shot from inside the area went over the crossbar, while Ceramica Cleopatra's Mahmoud Abdel-Hafez had a close-range effort denied by Ahly's international goalkeeper, Mohamed El-Shennawi, in the opposition's only real chance of the game.
Ahly suffered a setback when El-Shennawi was forced to leave the match due to a suspected hamstring injury.
Winger Taher Mohamed had a chance to give Ahly the lead before halftime but his close-range lob went over the goal.
The second half saw Ceramica Cleopatra's substitute midfielder, Mahmoud Touni, come close to scoring with a dangerous attempt that struck the crossbar just three minutes after the restart.
Ahly's Karim Fouad wasted a golden opportunity eight minutes past the hour mark, as his shot from inside the area sailed over the goal when he had a clear chance to score.
In injury time, Emam Ashour delivered a cross from the left flank that hit the post, and Justice Arthur's failed clearance resulted in an own goal, ultimately securing Ahly's victory.
With this win, Ahly advances to the final where they will face Modern Future FC on Thursday.
Modern Future FC secured their spot in the final by defeating Pyramids FC in a penalty shootout earlier in the day, with the match ending 14-13 in favor of Modern Future FC.
(For more sports news and updates, follow Ahram Online Sports on Twitter at @AO_Sports and on Facebook at AhramOnlineSports.)
Short link: