2017 Week 21 xG Matchup Rankings

With unlimited transfers this season, match ups are more important than ever. The question is how to evaluate match ups, especially if you’re only an aspiring Armchair Analyst and not yet the real thing. The answer? Expected Goals (xG).

What are expected goals (xG)

The idea behind xG is simple. Every shot is awarded a probability of scoring based on the position on the field and the game situation, based on giant databases of shots from years and years of data. Then at the end of the game all the xGs from the individual shots are added up to generate the team’s xG for that game. This metric is a useful measure of the teams overall attacking or defending play, more so than just looking at how many goals a team has scored or allowed. If you’d like to learn more, there’s a nice video by MLS to explain further:

http://www.mlssoccer.com/post/2017/04/24/what-are-expected-goals-learn-what-you-need-know-about-statistic

How to use these rankings

The rankings below use the xG metric to rank the match ups each week to help you determine which teams you should try to choose your attackers or defenders from. Each teams score is an average of their xG/g and their opponent’s xG/g separated out into offense/defense and home/away match ups. For example, if Atlanta plays NYCFC at home. Atlanta has an average home xG/g is 1.62 and NYCFC’s has an average away xG/g allowed is 0.96 for an offensive xG score  of 1.29 xG. The reverse can be done to calculate their defensive score for this week. The game by game xG numbers are taken from Ben Baer’s weekly xG article.

Week 21 Offense xG Match Up Rankings

Season Offense: Match up calculated using season xG average.

Form Offense: Match up calculated using average of last 3 games.

Week 22 Rank	Team	Opponent	H/A	Season OFF	Form OFF
1	Chicago Fire	NER	H	1.55	2.27
2	San Jose Earthquakes	CLB	H	1.48	1.78
3	NY Red Bulls	NYCFC	A	1.17	2
4	NYCFC	NYRB	H	1.56	1.5
5	Colorado Rapids	VAN	H	1.35	1.61
6	Montreal Impact	OCSC	H	1.38	1.57
7	Portland Timbers	LAG	H	1.59	1.32
8	Sporting Kansas City	ATL	H	1.59	1.3
9	Houston Dynamo	RSL	A	1.23	1.54
10	Toronto	DCU	A	1.37	1.39
11	RSL	HOU	H	1.4	1.31
12	Seattle Sounders	MIN	A	1.21	1.36
13	Philadelphia Union	FCD	H	1.31	1.21
14	Minnesota United	SEA	H	1.37	1.06
15	LA Galaxy	POR	A	1.1	1.32
16	FC Dallas	PHI	A	1.26	1.1
17	Vancouver Whitecaps FC	COL	A	1.03	1.23
18	DC United	TOR	H	1.16	1.05
19	Orlando City	MTL	A	1.04	1.09
20	Columbus Crew	SJE	A	1.02	1.04
21	Atlanta United	SKC	A	0.94	1.09
22	NE Revolution	CHI	A	0.89	0.68

Week 21 Defense xG Match Up Rankings

Season Defense: Match up calculated using season xG average.

Form Defense: Match up calculated using average of last 3 games.

Week 22 Rank	Team	Opponent	H/A	Season DEF	Form DEF
1	Chicago Fire	NER	H	0.89	0.68
2	Sporting Kansas City	ATL	H	0.94	1.09
3	San Jose Earthquakes	CLB	H	1.02	1.04
4	Montreal Impact	OCSC	H	1.04	1.09
5	Toronto	DCU	A	1.16	1.05
6	Colorado Rapids	VAN	H	1.03	1.23
7	Philadelphia Union	FCD	H	1.26	1.1
8	Portland Timbers	LAG	H	1.1	1.32
9	Seattle Sounders	MIN	A	1.37	1.06
10	FC Dallas	PHI	A	1.31	1.21
11	Minnesota United	SEA	H	1.21	1.36
12	Houston Dynamo	RSL	A	1.4	1.31
13	DC United	TOR	H	1.37	1.39
14	RSL	HOU	H	1.23	1.54
15	Atlanta United	SKC	A	1.59	1.3
16	LA Galaxy	POR	A	1.59	1.32
17	Orlando City	MTL	A	1.38	1.57
18	Vancouver Whitecaps FC	COL	A	1.35	1.61
19	NY Red Bulls	NYCFC	A	1.56	1.5
20	NYCFC	NYRB	H	1.17	2
21	Columbus Crew	SJE	A	1.48	1.78
22	NE Revolution	CHI	A	1.55	2.27