It is also known as jeu de paume in France and as `` court tennis '' in some parts of United States . It is also known as court tennis in the United States , formerly royal tennis in Australia , now real tennis , and courte-paume in France ( a reference to the older , raquetless game of jeu de paume , the ancestor of modern handball and raquet games ; many French real tennis courts are at jeu de paume clubs ) .