A player archetype is a playing-style label the Smashrs model derives from a player's underlying stats: serve patterns, return strength, and how points tend to be won and lost. It captures something a raw Elo rating cannot, namely how a player wins, not just how often.
Why style matters
Two players can have near-identical ratings and still be a bad matchup for each other. A huge server who lives on free points can dismantle a grinder who never gets a look at a second serve, yet that same grinder may eat alive a flat-hitting baseliner who gives him rhythm. These are matchup effects, and they show up in results even after you control for overall level.
How Smashrs uses it
The model assigns each player an archetype from their statistical profile, then looks at how that archetype has historically fared against the opponent's archetype. When a style matchup has a poor track record for the side the model would otherwise pick, that pick can be filtered out, a guardrail against confidently backing a player into a stylistic trap.
Browse the current style groupings for both tours on the archetypes page. Archetype context pairs naturally with the head-to-head record when you size up a specific matchup.