It depends on what level of game. On the pro circuit (i.e. the ATP or WTA), opponents cannot call foot-faults. Additionally, there are baseline judges who are there to call foot-faults just as there are judges on the sidelines to call the ball out. However, when there are no umpires (in lower level junior tournaments), a player can warn his/her opponent that s/he is foot-faulting, but then an official must be brought down to make an official call on the next observed infraction.
What has "professional" got to do with it ? A foot fault is a foot fault.
If you were referring to foot fault, foot fault is when serving you foot steps on the baseline or if it crosses the middle of the baseline. If you do commit a foot-fault, a serve is taken away from you; i.e if you make a foot-fault on a first serve you have to hit a 2nd serve and if you make a foot-fault on a second serve, a double fault is given.
you would call it a normal fault because the hanging wall goes down and the foot wall goes up and over the hanging wall.
A foot fault is when you serve and your foot touches the ground on or or forward of the service line before you strike the ball.
Either when someone is serving and steps over the back line (foot fault) or when someone up at the net steps on or over the middle line onto the opponents side of the court
yes it is a service fault
While serving, if the player's foot breaks the line, it is considered a foot fault, and the opposing team is awarded a point.
Take the fault as an inclined plane with the earths surface as the horizontal plane.The foot wall side of the fault is always located to the side where the plane of the fault and the horizontal forms an acute angle.The hanging wall side of the fault is always located to the side of the fault where the plane of the fault and the horizontal makes an obtuse angle.The terminology takes no regard to the direction of motion of the blocks either side of the fault. Thus for a dipping fault, the Hanging Wall is the block positioned over the fault and the Foot Wall is the block positioned under it.
Fault Foot fault.
For the beginning of every point, the server has two chances to get a serve in the correct service box. If on the first serve the ball is called a fault, then it is second serve. If on the second serve there is a let, then it is still the second serve, and the server may redo the serve.
This is known as the foot wall of the fault.
A foot fault is when in volleyball you serve and you pass the line or put your foot under the net.