This page explains how Michael Du Plessis (USATT# 202887)'s rating went from 1352 to 1349 at the MDTTC Butterfly February Open held on 18 Feb 2017 - 18 Feb 2017. 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.