Meaning of RUBBER in English
( n. )
In some games, as whist, the odd game, as the third or the fifth, when there is a tie between the players; as, to play the rubber; also, a contest determined by the winning of two out of three games; as, to play a rubber of whist.
Webster's Revised Unabridged English Dictionary. Пересмотренный полный словарь английского языка Webster. 2012