This page explains how David Rogers (USATT# 52251)'s rating went from 838 to 830 at the Spin & Smash Summer Open held on 2 Feb 2018 - 4 Feb 2018. 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.