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Is 381 square yards as big as a Tennis court?

It's about one-and-one-fifth times as big as a Tennis court
The size of a Tennis court is about 312 square yards.
(per ITF specification; for doubles)
Per International Tennis Federation Rules of Tennis 2009, a doubles tennis court should measure 23.7744 m long by 10.9728 m, for a total area of about 311.866360 square yards. Courts may be surfaced with crushed red stone, shale, brick, hard-soil grass, or asphalt.
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