A Let
It is called a "Let".
No it is not a hindrance. The person can keep playing the point if they can get up and get to the ball.
Let in tennis is when a point has to be stopped because of a distraction in the middle of a point from something like a balls rolling on to the court. A let is also where the serve hits the net and goes over into the correct service box. This rule applies to everything but the lets in World Team Tennis and Division one mens college tennis.
Wet, because in has more weight on it. If a tennis ball is wet it can't bounce it just falls and stays on the ground.
Niagara Falls is the correct spelling. (Notice the use of capital letters.)
it would hit the ground if there was one to hit
The address of the South Dakota Tennis Hall Of Fame Inc is: 4809 West 41St Street, Sioux Falls, SD 57106-1568
a tennis racquet falls on him
It served as the start of the Women's Suffrage Movement.
"Dust falls into your eye."
You draft a law suit that falls under federal court jurisdiction. You make the appropriate number of copies and attach the appropriate exhibits. You take it to the clerk's office in the appropriate federal court with the appropriate filing fee and have it filed, and then you have it served on the defendants. You may also be able to file it online rather than file in person in most districts.
No, it is not. However, the correct version to say this would be "Doesn't fall."
A rally is defined as: A series of return hits of the ball that ends when one or other player fails to return the ball within the court boundary or fails to return a ball that falls within the play area. Source: Wikipedia.com