Pato, also called juego del pato (Spanish pronunciation: [ˈxweɣo ðel ˈpato], literally "duck game"), is a game played on horseback that combines elements from polo and basketball. It is the national sport of Argentina since 1953.Pato is Spanish for "duck", as early games used a live duck inside a basket instead of a ball. Accounts of early versions of pato have been written since 1610. The playing field would often stretch the distance between neighboring estancias (ranches).