VII. THE COMPETITION I. Correction/ Verification of Call Line umpires.  When a Line Umpire realizes that he/she has made an erroneous  call, including an inadvertent sound, he/she should immediately call “Correction”  so that the Chair Umpire and the players are aware of the error. The Line Umpire  should then make the corrected call. J. Ball Mark Inspection Procedures (Clay Courts) 1) Chair Umpire a) A ball mark inspection requested by a player (team) shall be allowed only if  the Chair Umpire cannot determine the call with surety on either a point-end - ing shot or when a player (team) stops playing the point during the rally (Re turns are permitted but then the player must immediately stop). The Chair  Umpire shall check ball marks if there is some doubt about the accuracy of  the call. b) If the Chair Umpire sees a clear mistake, he may stop play with an overrule. c) The original call or overrule shall always stand if the Line Umpire and/or Chair  Umpire cannot determine the location of the mark or if the mark is unread - able. d) Once the Chair Umpire has identified and ruled on a ball mark, this decision  is final and not appealable. e) In clay court tennis, the Chair Umpire should not be too quick to announce  the score unless absolutely certain of the call. If in doubt, the Chair Umpire  should wait before calling the score to determine whether a ball mark in - spection is necessary. Ball mark inspections made after the score has been  announced or after first serves shall be done as quickly as possible so the  server is not unreasonably delayed. f) In doubles, the appealing player must make his appeal in such a way that  either both players stop playing the point or the Chair Umpire stops play.  If an appeal is made to the Chair Umpire, then the Chair Umpire must first  determine that the correct procedure was followed. If it is not proper or if it  is late, then the Chair Umpire may determine that the opposing team was  deliberately hindered. g)  Players may not cross the net to check a ball mark without being subject to  the Code. A player may not erase marks unless he is conceding the call or  after a ball mark inspection occurs and the Chair Umpire has made a final  decision. 2) Line Umpires a) If a Line Umpire has to make a close call, he must keep his eyes on the mark  and should not look at the Chair Umpire. b) If requested by the Chair Umpire, the Line Umpire shall walk directly to the  mark and identify the mark to the Chair Umpire. The Chair Umpire shall then  inspect the mark and make the determination. c) If directed by the Chair Umpire to identify a mark and the Line Umpire is not  sure of the mark, the Line Umpire must state immediately to the Chair Um - pire, “I do not have the mark.” K.Clay Court Cases Can’t Find Ball Mark Case:  A Line Umpire calls a ball out on a clay court. The Chair  Umpire asks him to show the mark. The Line Umpire cannot locate  160 161 4)  During the tie-break game in any set, each player/team shall receive one (1) ad - ditional challenge. This is in addition to any challenges not lost, if any, during the  set. 3)  Each player/team shall receive three (3) challenges per set (excluding the tie- break game). If the player/team is incorrect with a challenge, then one of the  challenges is lost. If the player (team) is correct with a challenge, then the player  retains his same number of challenges. Challenges remaining, if any, at the end  of a set do not carry over to the next set. 2)  In doubles the appealing player must make his appeal in such a way that either  play stops or the Chair Umpire stops play. If an appeal is made to the Chair  Umpire the Chair Umpire must first determine that the correct appeal procedure  was followed. If it was not correct or if it was late, then the Chair Umpire may  determine that the opposing team was deliberately hindered, in which case the  appealing team loses the point.  1)  A request for an electronic review of a line call by a player (team) shall be allowed  only on either a point-ending shot or when a player (team) stops playing the point  during a rally (returns are permitted but then the player must immediately stop). The use of an approved electronic system for reviewing line calls and/or overrules is  authorized for use at ATP events. The protocol for Review ELC is as follows: A. Electronic Review (Review ELC) L. Electronic Review / Electronic Review - Line Calling (Review ELC) Decision:  The Chair Umpire should check the mark. Case:  As a Chair Umpire, you overrule a ball on a clay court. The  player disagrees and asks for a ball mark inspection. You think that  maybe you made a mistake on the overrule. Overrule Then Inspect Ball Mark Decision:  The point stands as played. Both players must stop  playing or the player appealing must do so in a manner that results  in the Chair Umpire stopping play.  Must Both Players on a Team Stop to Get Ball Mark Inspection. Case:  In doubles on a clay court, the second serve is called good.  The receiver returns the ball but hesitates in search of the mark. His  partner crosses (poaches) and hits the ball into the net. The receiver  then appeals the second serve, stating that he stopped play prior to  his reflex return. Decision:  The procedure was correct (The Chair Umpire stopped  play after an interruption by player A.) The mark is examined and if  it is good, Team A-B loses the point; otherwise, it is a second serve.  Case:  Player B returns a serve but his partner, player A, says, “wait”  as he moves to look at the mark. The Chair Umpire stops play. The  opponent, player C, appeals to the Supervisor, saying player B  returned the serve, which player C put away. Clay Court: Doubles Ball Mark Appeal the mark and neither can the Chair Umpire. Decision:  The original (out) call must stand.  VII. THE COMPETITION