Rubber match

I know it’s the deciding game in a series, but what does it mean?

From this page:

I still don’t get it. What does it mean? What does rubber have to do with anything?

Merriam-Webster has the etymology of “rubber” as in bridge games as unknown.

This from Word Detective:

In short – no one’s sure, sorry.

To clarify, a bridge match was known, for whatever reason, as a “rubber.” You play your opponenent, and when you score 100 points, you’ve won a game. Best two-out-of-three is a rubber.

If both sides win a game apiece, the final game determines the winner of the rubber. Thus, the rubber match.

BTW, rubber bridge is played socially, but for tournaments they play duplicate bridge. Same game rules, but it’s set up so that all teams in the tournament play the same hands (You deal out the hands, but do not reshuffle the cards when its done, and put each player’s cards into a separate tray for each hand). The goal is to eliminate luck – you can’t win by getting a few good hands. Scoring is determined by seeing who did the best with each set of cards.