If the ball touches the line, it's considered fair play or in bounds.
The speed of a tennis ball can be determined by who is hitting it. An amateur or young child is not going to hit the ball as fast as a professional. At the professional level the ball can travel over one hundred miles an hour.
A tennis ball.
a golf ball weighs more than a tennis ball
a tennis ball
Tennis ball
A tennis ball.
A tennis ball.
Tennis ball
A tennis ball.
Tennis ball, its heavier.
There is no biggest tennis ball. the normal tennis ball has 6.7 cm as diameter.
A football weighs more than a tennis ball.