From January 2021 many browsers will no longer support Flash technology and some games such as Sports Heads Tennis Open may not work.
Solutions are being studied to allow Flash games being playable again on browser. If your game doesn't work you can try one of the similar games on this page.
Sports Heads Tennis OpenAuthor : MouseBreaker - 40 789 plays
The little guys with the big heads are back and keen to play some crazy tennis in Sports Heads Tennis Open! Compete in all of the Grand Slam tournaments with 16 of the greatest players in the world, either taking on the computer or a friend. Seeing as the Sports Heads never do anything by the book, there are certain bonus (or penalties) that appear during the matches, spicing up your games and making them even more fun!