Tennisoriginatedinthe12thcenturyto13thcenturyFrance,theFrenchmissionarywhowasoriginallythegamewasimportedAmericancountries,aswellastherestofEurope,andgraduallyevolvedintotoday'ssport.1896,intheGreekcapitalofAthens,heldasessionofthemodernOlympicGames,eightOlympictenniseventisoneoftheonlysportsevent.TennisprojecthadtowithdrawfromtheOlympicGamesin1924,until1984the23rdLosAngelesOlympicGames,issettoperformagain,torestorea1988Olympiccompetitions. 　　2004ofthe28thOlympicGamesinAthens,ChineseathletesLiTingandSunTiantianwasthetenniswomen'sdoubleschampion.The29thOlympicGamesforthemen'ssingles,men'sdoubles,women'ssingles,women'sdoublesfourprojects. 　　Forthenumberoftennisplayers:men'sandwomen'ssinglesofthe64,menandwomen'sdoublesofthe32right.Apartfromthemen'ssinglesfinalbyfive3-system,alltherestofthecompetitionwillbeusedWin2of3;Apartfromthemen'ssinglesinthefifthsetandtheremaininggameofthethirdset,thegameiscompetition,only净胜twoofthesettowinthecompetition(long-system),theotheradraw-gamewinningsystemisused(tiebreak). 　　CompetitionRulespoints:thechoiceofvenueandthefirstasaplayerorplayerstotherightinpreparationagobythrowingcoinstodecide. 　　Aftereachserve,thentheplayersinthenextBoardofbecomingaplayer,andtheplayershavebecometotheplayers.Inthedoublescompetition,thefirstofeachsetofthefirstserveandit'sathletesshoulddecidewhichonetoserve.Similarly,opponentsshouldalsobeinthesecondpriortothedecisionofwhoshouldserve.Thefirsttoservetheathletesteammatesinthethirdserve;secondserveathletesserveteammatesinthefourth.Inthisbehind-thecompetitionwillactinaccordancewiththisordertoserve. 　　Athletesshouldbeinthefirstsessionofeachinthethirdandtheback-endoftheexchangeofafewvenues.Athletesshouldalsobesetaftertheendofeachfromthetwosidesandthenumberofvenuesfortheoddexchange.Ifagameendedafterthetwosidestogetherandthenumberiseven,theninthenextsetaftertheendofthefirstexchangevenues.Inthedrawinthesemifinals,theteamshouldbeineverysixminutesaftertheexchangeofvenues. 　　Inanyofthefollowingconditionsaresub-contractorsmissing:aballinthesecond,failedtohitbackoverthenet;directlytouchedtheballbacktheothersitesoutsidetheboundaryoftheground,implantsorotherobjects;counterattackairballfailed;deliberatelyracketballmorethanonce;athlete'sbody,racketsandduringtheliveballhitthenet;shotoverthenet;parabolicshootshots. 　　Rulesareapplicabletothesinglesdoubles,butthedoublesrulesalsohavetheirownspecialrequirements:serviceorder,everysetbeforethestartofcompetitiontodeterminecatcherorderthatthepartyshouldfirstballinthefirstatthebeginningdecidetothereturnofserve,andinthisfirstsettocontinuetoserve.Theothersideshouldbethesameinthesecondbywhoeverdecidedatthebeginningofthereturnofserve,andinthisdouble-discofthefirsttocontinuetoserve.Theyshouldbeineverypeerintherotationtoserve. 　　赛ofetiquette:"respectforallpersonsandonthetenniscourts,"andthisisatleasttheplayerscodeofconduct,butalsotheaudienceshouldbedone.Beatennisfanisnotdifficult,butbeaqualifiedtennisaudienceisnotea