Toronto FC made the biggest upward move in the Sportify Power Rankings, ascending four positions to number nine with their 4-1 win over D.C. United. After failing to score in eight outings, Sebastian Giovinco generated 1.05 of TFC’s 2.9 xG which resulted in a hat-trick — a good omen for the Italian heading into the MLS All-Star game this week.
Toronto had an overall team rating of 74, helped by a 100 point performance rating in offense. The loss cost D.C. United three positions in the rankings; the Black-and-Red ended the week in the 17th position.
The Philadelphia Union had the biggest drop of the week in the Power Rankings after their 1-5 loss to the Montreal Impact at the Stade Saputo. The Union fell five positions to tie with the New England Revolution at number 13.
All-Stars Didier Drogba and Ignacio Patti had stellar performances; Drogba scored a hat-trick on 1.31 xG, and Ignacio Patti was involved in a total of 1.09 xG with two assists and one goal.
Fellow All-Star Andre Blake had a poor performance between the sticks for the Union, aggravated by Union’s worst defensive performance of the season. It was an overall disappointing performance by the visitors; no player on the team had a better overall rating than any Montreal Impact player. The performance gave Montreal a one-position boost to sixth in the rankings.
The LA Galaxy made their way back to the top with a 2-1 win at home over the Portland Timbers, that fell two positions to seventh.
The method: The Elo rating system
Elo ratings are a calculation of performance in head-to-head competitions originally developed for chess. This method has been used to rate a variety of competitions, including soccer. For each team, the calculation considers final scores, margin of victory, home field advantage and strength of schedule.
Sportify builds on existing ELO methodology, improving the season starting rating by using a combination of a proportion of a team’s rating in the previous season and a proportion of the league’s average rating. Wins always add points and losses always deduct points. Unexpected results, such as the upset of a strong team by a lower rated team, cause a greater fluctuation in points compared to “expected” results.