This page explains how Alexey Porollo (USATT# 276685)'s rating went from 1128 to 1309 at the Butterfly Spin & Smash February Open held on 17 Feb 2024 - 18 Feb 2024. 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.