I'm in a football(soccer) country and I play every Saturday, we do it just for fun but we always have trouble finding other players (teammates or adversaries),

I'm in a football(soccer) country and I play every Saturday, we do it just for fun but we always have trouble finding other players (teammates or adversaries), for which I see a great potential for your app. For those who want to play at a upper level they just gather a team and join a league, they would only use your app the first time while they are gathering a team, or when replacing a member. Most amateurs play seven-a-side football (futsal-like rules) or indoor soccer(a.k.a. arena-soccer, showbol , five-a-side soccer).