Amazing concept, love me some sports games.
Really enjoyed this one, simple yet engaging.
Add some sort of display to the zones or the actual players that are getting buffed/debuffed i think would have help with some decision making. Sometimes im not 100% sure if I'm making an impact or not.
Flesh this out a bit and add some rougelite treasure in-between each match and I could play it for hours!
Great Job!