Overwolf extension for Teamfight Tactics that overlays on the minimap which potential enemies you will fight next.
Green squares are your next possible opponents
Overwolf does't support unofficial extensions, and to make this available on the overwolf app store, it would need to be vetted by Riot, so instead you have to install it as a development plugin:
Install Overwolf https://www.overwolf.com/apps/
Download the latest .opk file from https://github.com/Jazcash/TFT-Scout/releases
Open Overwolf settings (right click it in tray)
Open Development options
Install extension
Open the .opk from the download
Launch
You know it's working when there's squares on the minimap. Sometimes the app stalls or fails to load automatically, reinstalling the extension usually fixes that. Otherwise try restarting your League client. The tool is useless when there's 3 total players left in the game, will make sure they're hidden at this stage in a future version.