Expected Goals

Neymar, Richarlison and the players underperforming xG

Who hasn't been hitting the target as often as their excellent underlying numbers would suggest?

 
4:13pm on Thursday 10th December 2020
By
Martin Macdonald

Everton forward Richarlison is the player within Europe's top five leagues who has underperformed the most in comparison to his Expected Goals.

The Brazilian has an xG of 4.2 over his appearances in the Premier League in 2020/21, but has scored just once, leaving him with an xG difference of +3.2.

Also with a difference of +3.2 is Dusan Vlahovic of Fiorentina, but he has played fewer minutes than Richarlison this campaign.

PSG star Neymar also features in the top 10.

Expected Goals are a useful metric over the longer term, because any good xG model will see its players regress back to the mean over time. It means that at certain points of a season we can assess a player's goal total, compare it to their xG total, and identify players who are either over or underachieving the model.

EXPECTED GOALS (xG) assesses the quality of a shot based on several variables such as assist type, shot angle and distance from goal, whether it was a headed shot and whether it was defined as a big chance. From there that shot is assigned an xG score and the cumulative total of these scores provides a team's xG for a match. Stats Definition

The purpose of identifying these players is not to suggest that they are poor finishers or are having bad seasons. On the contrary, the fact that these attackers are regularly finding themselves in good positions to score means, over time, they will eventually start hitting the target.

Getting into the position to score goals is one of the hardest skills in football and so having a high xG but low goal total is much less worrying than high minutes, low goals and a low xG. That suggests more of an underlying problem.

UNDERPERFORMING XG: TOP FIVE LEAGUES

Player Goals v xG

#Player NameTeamxGxG Diff
1RicharlisonEverton14.2+3.2
2Dusan VlahovicFiorentina14.2+3.2
3Neal MaupayxBrighton47+3
4Kevin De BruyneMan City24.8+2.8
5Aleksandar MitrovicFulham24.7+2.7
6Santi MinaCelta13.5+2.5
7Duvan ZapataAtalanta24.5+2.5
8Kevin LasagnaUdinese02.5)+2.5
9NeymarPSG35.3+2.3
10Breel EmboloGladbach13+2

Kevin De Bruyne is normally the chief assist maker for Manchester City, but as displayed by the table above he should have scored more himself this season. His penalty miss in the crucial Premier League clash against Liverpool gave him a significant boost in xG, which stands at 4.8 so far against just two goals scored.

Within the Premier League, Neal Maupay and Aleksandar Mitrovic join Richarlison and De Bruyne on the list, with xG differences of +3 and +2.7 for Brighton and Fulham respectively.

One player who hasn't scored at all this season is Kevin Lasagna of Udinese. The Italian forward has an xG of 2.5 but hasn't been able to open his tally in Serie A from the chances created yet.

PSG tend to create plenty of chances, and there is evidence of wastefulness from Neymar as the Brazilian superstar has scored just three goals against an xG of 5.3.

He has actually outscored himself in the Champions League compared to his duties in Ligue 1 despite playing fewer matches.

What underperforming xG means

Underperforming xG is a small sample size is not necessarily a bad thing. Indeed it means that a player - like Richarlison here - is regularly working into good positions and optimum places to score from, but isn't quite getting it done.

xG does mean that - theoretically, at least - if a player continues to get into those positions, the chances should fall for them eventually and the goals will come.

Latest news

Standings

La Liga Table: Barcelona's crisis continues under Koeman

Ronald Koeman risks the sack after Barcelona fell to yet another miserable defeat, losing 1-0 to Rayo Vallecano.

  • 13 hours
European Assists King

European Assists King 2021/22: Pogba & Benzema remain top

The Man Utd and Real Madrid stars still lead the standings but their advantage has been trimmed over recent weeks.

  • 1 day
Predicted XI

All change from Old Trafford? How Liverpool could line up against Preston

Jurgen Klopp's side battered Manchester United at Old Trafford, but in the EFL Cup, he could make several changes to the starting XI

  • 1 day
Predicted XI

No changes from El Clasico? How Real Madrid could line up against Osasuna

Carlo Ancelotti's first El Clasico back at Real Madrid was a success and against Osasuna, he may stick with the same starting XI

  • 1 day
Predicted XI

Aguero to finally start? How Barcelona could line up against Rayo Vallecano

Ronald Koeman's job is on the line, so he needs his Barcelona side to pick up three points against Rayo Vallecano. How will the Blaugrana line up?

  • 1 day
European Golden Shoe

European Golden Shoe 2021/22: Lewandowski and Salah lead the way

Erling Haaland and Robert Lewandowski both surged up the standings in the race to score the most goals in Europe this season.

  • 3 days

Most read