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TENNISTennisisabeautifulandintensesports,theoriginanddevelopmentoftenniscanbesummarizedwithfourpoints:borninFrance,developedinEngland,begantospreadandreachthepeakintheUnitedStates.Nowadays,itispopularallovertheworld,knownastheworld'sfirsttwogreatballgames.KEYWORDS:tennisracket网球拍tenniscourt网球场tennisball网球servicearea发球区tennisserve发球receive接发球Return回击球Ace发球直接得分breakpoint破发点coverthecourt防守breakpoint破发点deuce局末平分,盘末平局fault失误doublefault双误forehand正手hardcourt硬地场地lovegame一局中一方得零分matchpoint赛末点Tennisopen网球公开赛FourGrandSlamTennis四大满贯FourGrandSlamTennisLiNaMariaSharapovaSerenaWilliamsRogerFedererRafaelNadalNovakDjokovicAndyMurrayTHANKS