Senegal slotted home in the 13th and 21st minutes to hand the Iranian side a 2-0 loss.
Fajr possessed both ball and field since the second goal and attacked the African woodwork several times but it failed to score and lost 2-0 in the normal time.
In its second game, Fajr meets the Saudi Arabian under-23 team Monday.
Friendship Cup started Friday and 10 teams are competing in the event.
KK/SM
End
MNA