Yetunde Adeboyejo started the goal rush, scoring the first of her three goals in the 15thminute, before 2014 U-17 Women’s World Cup strike partner Chinwendu Ihezuo added a second on the half hour mark.
Adeboyejo netted her second and Nigeria’s third nine minutes before half time, but the Liberians got a goal four minutes later, to end the first half 3-1.
Adeboyejo made sure of her hat -trick early in the second half, before Juliet Sunday netted the fifth goal in the 70th minute.
There was no road for the Liberians into the game again, and Amarachi Ojinma scored two quick-fire goals late in the game to make it 7-1 to the Falconets.
The second half leg comes up in Nigeria in two weeks’ time.