I was wondering about bowling. I also thought about tennis, but as I understand it, tennis has numerical rankings, such as 3, 4, 5, etc. and you get grouped into a numerical range when you play in a tournament, However, you still play straight up against the opponent. To me, this would be similar to flights in golf, where you still play gross within your particular flight.Amateur tennis rates players and assign levels (NTRP). I competitions players of similar ratings play each other. I think most bowling leagues use a sort of handicap based on average score. You are correct that team sports don’t use any real system in an attempt to level the playing field.