答：戴維斯杯，或國(guo)際網聯(lian)主辦(ban)的(de)其他正(zheng)式(shi)錦標賽規定，端線以(yi)外(wai)至(zhi)(zhi)少要(yao)有(you)(you)6.40米(21英尺(chi))的(de)空(kong)(kong)地，邊線以(yi)外(wai)至(zhi)(zhi)少要(yao)有(you)(you)3.66米(12英尺(chi))的(de)空(kong)(kong)地。司線員座椅可(ke)安(an)置(zhi)在球場后面6.40米(21英尺(chi))的(de)空(kong)(kong)地內，或安(an)置(zhi)在球場旁邊3.66米(12英尺(chi))的(de)空(kong)(kong)地內，只(zhi)要(yao)座椅凸出該(gai)區(qu)不(bu)超過0.914(3英尺(chi))即可(ke)。