Real De Banjul's hopes to grab a rare away point in Morocco went up in smoke after FUS De Rabat poked in a controversial last-gasp goal from the penalty spot.
Alagie Sarr put up a defensive setup hoping to frustrate the host - a tactic he contentedly managed to achieve but the gaffer's return to the African Champions League was a bitter pill to swallow just when the match was finally tipped for a stalemate.
Donning an untypical green strips at the Molay Abdelleh complex on Friday, the Gambian side had their hands in their heads in disbelief after the central referee pointed to the spot kick gifting the Moroccans a controversial chance to seal all points.
Footage of the incident shows FUS Rabat's striker going down under what appeared to be a minimal mid-air challenge from a Gambian defender in the Real De Banjul box and the referee wasted little time to award for a penalty a minute from additional time of four.
Mourad Batma stepped up to slot in a left footed effort nestling the ball to the back of the net sending Real's goalkeeper the wrong way.
While Baboucarr Trawally is replaced by Salifu Krubally, Rabat came close to opening the score when a FUS Rabat striker's well placed header from a corner kick rattled on the cross bar.
The Moroccan side who are making their first appearance in the CAF Champions League will return visit in Banjul for the second leg early March.