Plugin Suggestions for an E-sport league wordpress site

the Title has it, I’m looking for suggestions. I’ll be running a league based on a game where there will be teams of 5 players each facing each other once a week. for example

4 teams,
[week 1]
team 1 vs team 2
team 2 vs team 1
[week 2]
team 1 vs team 3
team 2 vs team 4
[week 3]
Semi-final, etc.

So in order to make this work, I need users to be able to create teams/groups on my website, they’ll then have to invite each of those 5 players to their team then contact my webmaster email and apply for a spot in the league.

I’ll run qualis, so I need everyone able to create groups, but preferable a user should only be able to create one team and I think users should be allowed to browse through the existing teams.

I’ll post results of each match and I’ll even attach replays for them.

Then perhaps a side-bar widget with sponsors so that I can run larger prizes.

Also a little latest match sidebar widget: team 1 vs team 2 = [Loss]2-3[Win]

Any other suggestions highly appreciated : )