Chaabani took over Masry in the summer, replacing Ali Maher, after a three-year spell at Tunisian giants Esperance where he won a host of titles including two African Champions League trophies.
Masry were the closest to victory but Amr Moussa missed a penalty kick in the 18th minute and Nigerian striker Austin Amutu missed with a header from inside the six yards with the goal at his mercy.
The Port-Said-based team would have to finish the job back home when they host the Ugandans on 24 October.
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