Cyril Olisema scored the decisive goal as Enyimba beat Rivers United 1-0 in their CAF Confederation Cup playoff fixture in Aba on Sunday, reports
The game was held up for several minutes as a result of heavy downpour after just nine minutes of action.
Olisema netted the winning goal a minute before the hour mark.
Enyimba played the last 15 minutes of the game with 10-men after Tosin Omoyele was sent off.
The return leg will take place next weekend in Port Harcourt.
The overall winners will advance into the group stage of the competition.
