This page explains how Harry Gao (USATT# 74834)'s rating went from 1589 to 1577 at the Butterfly Spin & Smash August Open held on 6 Aug 2021 - 8 Aug 2021. 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.