This page explains how Parviz Mojaverian (USATT# 8429)'s rating went from 2177 to 2161 at the 2021 U.S. Open Table Tennis Championships held on 17 Dec 2021 - 22 Dec 2021. The links below take you to pages that describe various aspects of the ratings processor.

The ratings 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.