Why Self-Rated Skill Levels Don't Work (And What Sandbagging Costs Everyone)

Every rating system we've covered, NTRP, padel levels, SquashLevels, USR, has the same weak point: at some stage, a person has to be honest about their own ability, and people are bad at that. Not because they're liars, but because self-assessment under social pressure is genuinely hard. Nobody wants to call themselves a beginner in front of strangers, and almost everyone remembers their best day on court more clearly than their average one.

Sandbagging, the deliberate underrating of your own skill, gets talked about constantly in tennis circles (r/tennis has entire recurring threads about it) but it happens everywhere ratings determine who you get matched against. The motives are straightforward: win more, face less resistance, and look good doing it in a bracket you know you can dominate.

It's not always malicious. Some players genuinely don't know their level and default low out of caution. Others rated themselves accurately years ago and just never updated the number as they improved. But the effect on opponents is the same either way.

The people who pay for sandbagging are almost never the sandbaggers. It's the player who signed up for an intermediate match and got steamrolled by someone who called themselves a beginner. It's the person who spent an hour driving to a court for a game that wasn't remotely competitive. Over time, it's the whole community: players stop trusting self-reported levels, organizers over-correct by making brackets stricter than they need to be, and casual pickup culture gets a reputation for being unpredictable, which pushes newer players away entirely.

The fix isn't asking people to be more honest. It's removing the incentive and the guesswork by building ratings from actual match outcomes instead of self-report. That's exactly what computer-generated NTRP, SquashLevels, and USR are trying to do within their own sports, with real success, and it's the same principle Rally applies across all three: your rating comes from how you actually perform against other Rally players, updated continuously, not from a box you checked once and never revisited.

For a practical way to compare levels across sports in the first place, see our cross-sport Rosetta Stone guide.