Premier League Insights: Analyzing Team Performance Through Expected Goals
The Premier League table is beginning to take shape, and while results are paramount, they do not fully capture the dynamics of how teams are performing thus far.
Expected goals (xG) provide insight into how teams dominate matches by generating numerous quality scoring opportunities while limiting their opponents to fewer and less favorable chances.
Although the season is still in its early stages and some teams have faced tougher challenges than others, historical data from the Premier League indicates that teams that dominate games tend to achieve greater success over time.
Penalties are excluded from this analysis as they can skew a team's statistics regarding their overall threat level and defensive vulnerabilities, especially at this early juncture.
The graphic below illustrates the attacking and defensive capabilities of teams, with the most dominant squads positioned in the top-right corner and the least effective in the bottom-left. The higher a team ranks on the chart, the more potent their attack, while a position further to the right indicates a stronger defensive performance.
Arsenal and Manchester City emerge as the most dominant teams, with Arsenal boasting the best defense and the fourth-best attack, while Manchester City features the joint-best attack and the fourth-best defense.
Crystal Palace, currently performing exceptionally well, is the only team that can rival City's attacking prowess, while Newcastle has shown remarkable defensive strength, nearly matching Arsenal's solidity.
Both Manchester United and Chelsea possess one of the league's top five attacking units but unfortunately also rank among the bottom five defensively.
Liverpool's recent back-to-back defeats, following a five-match winning streak, provide a clearer picture of their performances, while Tottenham has had to rely on efficiency to compensate for their lack of dominance in matches.
Aston Villa's early-season difficulties are no longer attributed to finishing, as they have scored six non-penalty goals from an xG of 6.0, but rather to poor overall performance.
Promoted teams Leeds and Sunderland have adapted relatively well to the Premier League, whereas Burnley has struggled significantly, possessing both the worst attack and defense.
Focusing specifically on attacking statistics, Manchester United, Arsenal, and Liverpool have taken the most shots, averaging approximately 15 per game. However, Manchester City and Crystal Palace lead in overall attacking performance due to their ability to create higher-quality chances, averaging around 0.14 xG per shot. Historically, Premier League teams have converted chances created by City and Palace at a rate of 14%, compared to just 10% for the shots taken by United, Arsenal, and Liverpool.
Brentford presents an interesting case; despite averaging only eight shots per game, the high quality of their chances allows their attack to rank mid-table overall.
In terms of defense, Arsenal and Newcastle have excelled by conceding the fewest shots per game and the most challenging scoring opportunities. However, Manchester United and Burnley stand out for their significant defensive issues.
While Manchester United appears defensively solid based on the number of shots faced—only Arsenal and Newcastle allow fewer than their average of 9.1 per game—the quality of those shots is concerning. Ruben Amorim's side is allowing the easiest chances in the league, averaging 0.16 xG per shot faced. Burnley, on the other hand, confronts the highest number of shots at 18.4 per game, although the quality of those attempts is relatively low.
Finally, while most teams' expected goal differences align closely with their actual performances, Tottenham stands out as the league's most in-form team. They have been exceptionally clinical, scoring five more goals than expected based on their chances. At the other end, goalkeeper Guglielmo Vicario has excelled, preventing more goals than any other keeper in the league (2.9). While this is advantageous in the short term, Thomas Frank will need to enhance his new club's dominance in matches, as historical trends indicate that consistently overperforming one's xG is not sustainable.