T4C Power Rankings are Tennis4Cast's player strength ratings built on a surface-aware Elo model trained on match-by-match results. Separate ratings are maintained for clay, grass and hard courts. The overall Elo reflects a player's peak performance across all surfaces.

Official rankings are the ATP/WTA Race to rankings (sourced from Jeff Sackmann's open tennis database), updated weekly. Comparing the two reveals players who are over- or under-valued by the official system — Elo accounts for quality of opposition, which the points-based system doesn't fully capture.