It all depends on how long the match is but if it was over a long period of time it would be about 3 referees
there is only 1 referee in tennis
there are 6.
Two players on each side compete in a tennis doubles match.
In wrestling there is only one referee reffing a match.
Each half of a soccer match is 45 minutes long (plus any extra time that a referee wants to add for lost time used by fouls and such).
10 points as a maximum