This page explains how Jolie Hu (USATT# 1180925)'s rating went from 621 to 577 at the Gold Coast TTC January 2024 Open held on 14 Jan 2024 - 14 Jan 2024. The links below take you to pages that describe various aspects of the rating processor.

The rating processor goes through 4 passes in order. The links take you to pages that provide detailed explanations of the calculations during each of the 4 passes.