Juma Mahadhi scored for the hosts against the Seychelles side, who were largely dominated the entire game.
It is the first game of preliminary stages in CAF Champions League 2018.
The only goal of the match was scored by Juma Mahadhi the banch warmer who slotted nicely the ball from the corner by Geofrey Mwashiuya.
After the final whistle Mahadhi said their opponents used defensive technique which made the game difficulty but Yanga were lucky to get the lone strike.
As a result, Yanga should win or draw in the second leg to qualify for the next stage of the tournament.