Sportowa TV is one of the best sports Addon for Kodi.
To install it just go to System in the Kodi main menu
then select File manager
Now click on add source
Click on <None> and type
http://mbebe.github.io/blomqvist/
and then select Done
Then type a name for this media source, for example blomqvist
Now go back to Add-ons and click on the box
Click Install from zip file
Then choose blomqvist, then repository.mbebe.zip
Now choose Install from repository, mbebe, an then choose Video-addons and finally choose Sportowa TV.
Now wait for the repository to be installed untill the Sportowa TV icon appear in the top right corner.
Sportowa TV is now installed, enjoy the best sports.