During the service motion, the server shall not:
a. Change position by walking or running, although slight movements of the feet are permitted; or
b. Touch the baseline or the court with either foot; or
c. Touch the area outside the imaginary extension of the sideline with either foot; or
d. Touch the imaginary extension of the centre mark with either foot.
If the server breaks this rule it is a “Foot Fault”.
Case 1: In a singles match, is the server allowed to serve standing behind the part of the baseline between the singles sideline and the doubles sideline?
Case 2: Is the server allowed to have one or both feet off the ground?