Once the last ball of the season has been kicked and a few hundred Premier League footballers have flown off to exotic locations to rest their battered feet, I’d like to think club staff get themselves round the table for a season debrief.

They’d discuss what went right, want went wrong and what went……..Mmmkay.

Come May, this process might take a little while longer at Spurs than it would at other clubs. The league position isn’t a disaster by any stretch, but player trades on the whole haven’t worked out. Sooner or later, the guys at the table (after a long time sidestepping it) would stumble upon what was maybe the crowning turd in the transfer water-pipe. Before the season started, Colin Trainor, voiced concern about the transfer of Roberto Soldado here. Taking penalties away, Soldado has scored 2 league goals this season compared to 19 last. I’m going to try and build on Colin’s work by asking the kind of simple questions I’d be asking if I was sat down at that table, discussing the reasons why its all gone paella-shaped.

Is Soldado taking less shots?

This season he’s taking 2.7 shots per 90 mins. Last season he was taking 3.1 shots per 90 mins. That’s an extra 15 shots per season if all minutes were played out. He’s taken 52 shots this season compared to 100 last. None of this explains the huge difference in goals we’ve seen.

How many shots is he getting on target? Is he getting into the same areas to take them?

It’s nice to visualise this one. The deeper the red on the graphic below, the bigger the volume of shots on target from that zone:


The graphic quite clearly demonstrates part of the problem. Same areas, but a drastic reduction in volume. Soldado is a penalty box striker, pure and simple.

So how did Valencia 2012/13 compare to Spurs 2012/13? Was it a complete style mismatch when they bought him?

The graphic below shows the volume and type of chance the two sides made in the penalty area last season.

Valencia Spurs Comparison 1

I didn’t see much of Valencia last season. I’m not sure what I was expecting to find but it wasn’t this. The two teams were almost identical in this regard.

 Ok, so what about Valencia 2012/13 versus Spurs 2013/14? Have Spurs done something different?

Valencia Spurs Comparison 2

Once again Spurs are well on track to at least equal Valencia in every department bar set piece deliveries.

So if he’s getting in a similar amount of shots per 90 as he was before, he’s just not putting them on target as much, right?

Right. Roberto’s gone from getting 43% of his open play shots on target last season, to just 23% this season. It’s a whopping drop but it’s fairly common as you can see in this cracking piece by @willtgm. Will’s work suggests that this drop is nearly as likely to be luck or other factors influencing play as much as it’s down to the skill of the individual involved.

Those other factors. The teams as a whole might have been similar in style and volume, but maybe Soldado himself isn’t getting on to the same type of chance as last season?

This is what that looks like:


This is pretty much bang on identical too if you take minutes played into account. There’s a small drop of passes played into him from in the hole. However, as he didn’t score from any of these last season, it’s difficult to say it’s a problem. The only thing is, this is how both his open play goals for Spurs have come about.

Does it take less shots on average to score in La Liga?

It does, but the differences aren’t significant. Definitely not significant to explain the Soldado puzzle.

Might that say something about defensive pressure on the ball?

It might, but the data for this isn’t publicly available. The video of Soldado’s goals is here:

Looks like a mix here. On some occasions there’s time and space to finish and on some occasions it’s a tight spot with good movement and finishing on show. The way Spurs played under AVB (high press, hemming opponents in their half) might look a little different to this. Spurs didn’t build quickly and as a consequence opposition defences were fairly set. However, under Tim Sherwood things are different and it still hasn’t happened for Soldado.

How would the average shooter in the Premier League do with the same volume and type of chances that Soldado’s had this season?

My expected goals model suggests 4 goals should have been scored in open play with the shots on target he’s had. That would be the benchmark. The Spaniard is therefore only 2 goals behind where he should be. Simulating these shot situations thousands of times over means we can put a measure on how good or bad that performance might actually be.


We can expect a Soldado-esque performance just over 10% of the time. Considering there’s only a 20% chance you’ll actually get the benchmark performance of 4 goals, Soldado’s efforts might not sound so bad. However, the reality is we’re looking at an 83% probability that your benchmark shooter would outperform him.

 None of this is really explaining it. Has he just been unlucky?

I’ll be honest. it’s not a term I like very much. When it comes to what happens in football, everyone has a reason for everything. However, when it comes to goalscoring, the longer I delve into the numbers the less reason I’m finding for stuff that happens. My studies into goalscoring so far suggest that even the ‘best’ strikers in the Premier League come back to mean over time. Is this simply what Soldado is doing? Here’s his rolling performance starting from his last season with Valencia until now (this is far back as the publicly available data goes):

Soldado Rolling

Looks like a case of him regressing back to where he should be to me. Will’s work on shots on target (linked above) is fairly important. Next season Soldado might just start getting shots on target again and probably getting goals. The staff at the club could no doubt start watching hours and hours of footage and maybe put their finger on the reasons why. I’m sure something could be found and they’d be happy with the explanation. Increasingly, my explanations around goal scoring sound a lot like: sometimes shit happens.

Some nice analytics could probably tip the odds slightly in your favour over time. You should stop looking for certainties – they don’t exist. No one wants to hear that message. But if someone like me can get to grips with it, so can you.

  • jair1970

    One of the ironies of Soldado is that he’s like a less dynamic Defoe.
    He brings so little to the team play bar the odd lay off that without goals his contribution is reminiscent of an aging Shearer.

    Sadly, of the ‘Magnificent 7’ signings, he’s the one that I have least hope for, he has no room for improvement & as each match goes by his frustration and limitations grow ever more apparent. That he has claimed to be committed to staying at Spurs is not overly pleasing.

    Supposedly Levy had been interested in him for years & bought him as a shiny new present for AVB. Months on the wisdom of this, when based on the economic reality of £26m seems lax. At least with the other signings, they had hallmarks of ‘Levynomics’; improving, youngish players with great potential.

    Spurs are weird in that a lot of their business seems to be smack bang on smart theory (Capoue good on stats, ditto Lamela/ Eriksen) then you hear rumours of agents recommending players & you wonder where the scouting/analysis went.

    Recent matches have led me to believe that biting a club’s hand off for £10m would be a smart thing to do; it won’t happen though cos Levy won’t allow his personal or financial pride to do it & Soldado could well up being the most expensive bench warmer in town; then again I suppose he already is.

    • Aaron

      Sorry, I have to disagree on what he brings to the team. His link-up play has been very good all season, especially against Southampton last weekend where he linked up brilliantly with Eriksen and causing all sorts of trouble for their defence.

      If anything, he’s an incredibly dynamic Jermain Defoe.

  • counterattack

    Very interesting. From where do you get the data for your analysis? It is amazingly detailed.

    • Paul Riley

      Here, there and every where. Espn, whoscored, soccerbot, transfermarkt, squawka, statszone, soccerbase.

  • meansong

    Very interesting article.
    The human factor is not easy to measure but may be playing it’s part. Some players hit the groung running and fit like a glove. Others can take time to settle, both in a football and family/social sense.
    I’m old enough to remember the phrase, “it’s only his first season”, one that’s gone out of vogue in these demanding and impatient times.
    I also remember Dider Drogba having a mare of a debut season with Chelsea. Mourinho stuck with him, under a bit of pressure from fans and media, ultimately reaping the rewards.
    I’m not suggesting that Soldado is a Drogba in waiting, but there is a fair chance that if he goes back to la liga this summer, Spurs fans will be watching him chalk up a few goals (maybe against them in the Europa!) and wonder why he didn’t do it for them. Diego Forlan anyone?

    • Ben

      Yes but that would ignore the reasoning behind the whole article, which is that he’s actually pretty much playing a little bit beneath his level last year, no? An increased output of 2 more goals wouldn’t make or break Spurs’ season.

      If Spurs wanted to get more out of him, they would have to adapt their style to create a lot more of the high quality chances he fed on in his last season at Valencia.. which probably isn’t a bad idea anyway, if you want to challenge for the top 4?

  • Tuiuan

    I was thinking about this article when I read a piece in Grantland that remembered me about a funny thing about NFL Kickers: They also can get hot and cold, but generally regress to the mean. I just think that kicking a ball correctly is a damm hard thing that can be influenced by an enormous ammount of things(speed of the ball, wind, defensive pressure, how you dominate it first, even the spin,etc)., more study is necessary, and maybe with a more detailed data, we can determine better why this stuff happens.

    That being said, I think this adds to the record that you shouldn’t: 1 – Pay a high fee for players who have just 1 good season and 2- Pay a high fee for mono-skilled strikers who can only contribute to the game by putting the ball into the net.

  • Dick Scratcher

    Is Soldado taking less shots?

    Grammatically speaking, that is impossible. It turns out he is taking fewer shots. 🙂

    Not that I am many bothered about grammatical matters …

    On a more serious note, at times Soldado has looked the second most likely Spurs player to deliver a killing pass (Eriksen being the most likely). Unfortunately, he’s primarily there to score goals, and he is largely failing in that regard.

    Were this the NFL, Spurs could just bring him on for penalties; he seems pretty good at spot kicks.

  • Byo

    Great analyis.

    I saw a lot of Soldado in the Spanish league. He was never my cup of tea-this just from my eye test. Was he playing against a weaker defence (if you took out only a handful of oppositions)?
    I never thought he would do well in the EPL, so I was surprised when he was acquired by Spurs. But then they has the Bale money to spend.

    An objective look at all the Spurs acquisitions shows that Erickson (and probably Chiriches) are the only successes.

    • AVBO

      Nothing wrong with Soldado’s technique….good close control, good vision and good positioning sense. The problem is the type of support he doesn’t get from other Spurs players. Once the Spurs striker gets the ball, there’s a tendency for the support players to sit back and admire, and that doesn’t suit his game. Soldado would fit in better with Man utd or Arsenal in terms of ‘combined attacks’ and his goal rate would improve accordingly. He’s not a ‘Solo’ striker. Don’t be surprised if Man Utd pay £30m for his services !

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