Install freetennis by entering the following commands in the terminal:
sudo apt update sudo apt install freetennis
Description:
Free Tennis - simulation game
Free Tennis is a free software tennis simulation game. The game can be played against an A.I. or human-vs-human via LAN or internet.
Homepage: http://freetennis.sourceforge.net/
Version: 0.4.8-10build2
Section: universe/games