GAME GUIDES
Bringing different eras onto one court
A meeting between legends is a question to explore, not a historical result to discover.
Why raw numbers are not enough
Players from different decades faced different opponents, calendars, and playing conditions. The surviving results also vary in completeness. Simply putting every historical number on one list would suggest a precision the evidence cannot support.
21–0 puts player-year cards on a shared scale for cross-era play. In plain language, the game considers how a season stands within its own competitive setting and how much historical evidence supports it. This makes a mixed-era draw playable without pretending the players all followed the same schedule.
A season is not an entire career
Imagine drawing an early-career card and a later card for the same champion. You are choosing between two versions of that player, not adding all their career achievements to either one. A peak year and a quieter year can offer different challenges even though the name is identical.
The same idea applies to doubles. Different partnerships and different seasons tell different stories. A celebrated player's reputation alone does not tell you everything about a particular pair's card.
What the comparison cannot settle
No adjustment can recreate an unplayed match between two eras. Equipment, training, travel, rules, and the depth of the field changed over time. Sparse early records leave questions that a rating cannot answer. All matches in the game use its shared 21-point format, rather than reproducing each historical edition's scoring rules.
A simulated win is therefore an outcome of this game, not proof that one champion was greater than another. An upset can be an enjoyable starting point for a discussion, but it is not new historical evidence.
Give your draft a theme
Try a favourite decade, a player at an unfamiliar career stage, or a Cup team built around several generations. Let the card's year guide your expectations. If a comparison surprises you, read the source-coverage guide before treating the number as a complete account of that player's season.