This page explains how Hau Lam (USATT# 37020)'s rating went from 2105 to 2101 at the 2015 U.S. Open held on - 11 Jul 2015. 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.