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.
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
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.
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.
In a foot-wall fault, the fault plane is beneath the rock that is being mined, while in a hanging wall fault, the fault plane is above the rock being mined. The foot-wall fault refers to the foot or bottom of the inclined fault plane, while the hanging wall fault refers to the hanging wall or top of the fault plane.
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.