VizWiz

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Showing posts with label Arsene Wenger. Show all posts

August 9, 2018

The Petr Cech of Chelsea was outstanding...then he moved to Arsenal

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Arsenal signed goalkeeper Bern Leno in the offseason. Rumors have been swirling about when, not if, he'll takeover as their top choice keeper. Three summers ago, Arsenal signed Petr Cech away from Chelsea, and with that signing, Arsenal had hoped to sure up their defense.

In an Arsenalesque sense of optimism, Arsene Wenger thought bringing in a great goalkeeper would solve their defensive woes. Many fans, however, knew that the real problems were in front of the goalkeeper. Without a solid defense, a goalkeeper cannot be effective.

This led me to thinking about how Cech's first three seasons compared to his first three seasons with Chelsea, when he was widely considered one of the best goalkeepers in the World. The data shows that Arsenal more or less ruined him. Or did Chelsea's stellar defense make him better than he really is?

June 5, 2017

When Arsenal Lost the Plot...and the Significance of the Change to 3-5-2

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I've had this viz on my mind for a couple months now, basically since Arsenal crapped themselves mid-season. I wanted to understand the ebbs and flows of the season a bit better. This also gave me a good excuse to practice using Tableau's story points feature.

So I sat down last night and cranked out this viz and story about Arsenal's 2016/17 campaign, including the up, the downs and the inevitable contract extension for Arsene Wenger.

Enjoy!

January 16, 2013

The one chart that shows how the sale of Robin van Persie impacted the fortunes two clubs

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Super Sunday has come and passed along with yet another abject Arsenal performance.  I attended the game with about 100 of my fellow Bay Area Gooners at Maggie McGarry’s in San Francisco. This is THE place to watch Arsenal. 

We were pumped for the game, only to be let down nine minutes into a game by a stupid foul and the subsequent sending off of Laurent Koscielny.  Why wasn’t the BFG Per Mertsacker playing in the first place?  That’s another rant for another time.

Several Gooners at Maggie’s were talking about Arsenal’s lack of ability to dominate the final third of the pitch, which got me daydreaming back to the days of Robin van PersieArsene Wenger sold RVP to Manchester United over the summer, literally telling Sir Alex Ferguson that he was handing him the title.  Of course, RVP has continued scoring like the 3rd best striker in the World.  I think our manager has lost the plot. 

I pulled some data down from the Barclay’s Premier League website to see how teams were performing through 21 fixtures this year compared to last.  I created this:


Tufte introduced slopegraphs in his book The Visual Display of Quantitative Information.  This type of chart is useful because is helps quickly highlight:
  • The order of the clubs
  • The specific number of points accumulated by each team in each year
  • The slope reveals the change over time and each club’s rate of change compares easily to other teams
  • There’s almost zero non-data ink.  I say almost because I used red to highlight Arsenal.
Presented this way, the data reveals a few simple observations:
  • Manchester United have opened on the rest of the league this year and that they were in 2nd place last year.
  • The gap between Man U and Arsenal is HUGE this season, which is surely directly correlated the RVP’s transfer.
  • Everton and West Brom have had much stronger starts to the season.  Don’t be shocked if Everton snatches the last Champions League spot.  It sure doesn’t look like Arsenal has the heart to do it.
  • Newcastle sucks this year!
  • Most importantly, we’re only 5 points behind Spurs, whereas we were 10 points behind at this point last year.  If we’re not going to make the Champions League, we could take a bit on consolation in finishing ahead of Spurs.
If you have an ideas on how to turn Arsenal’s season around, please feel free to let the club know.

January 16, 2012

Arsenal continues to stumble. Have they become too dependent on Van Persie? The stats don’t lie!

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Another weekend has passed by and another totally lackluster effort from my beloved Gunners.  I knew they were in deep, deep trouble when they scored so early in the game and of course it was Robin Van Persie with another classy finish.  This makes three games I can think of where Arsenal scored really early and couldn’t hold on.  Surely there were other occasions as well.

Miraculously someone other than RVP scored later in the game (Theo Walcott), but when the final whistle blew and there were few chances created, I began to ponder what could happen if RVP gets hurt (some might say when instead of if).  Arsenal’s dependency on RVP has been staggering this season.

I created the viz below based on club and squad stats from ESPN Soccernet for EPL games. 

Here’s how I designed it and what I’ve observed:

  1. Anything in red = Robin Van Persie
  2. The dotted lines represent the averages over the 11 seasons
  3. There’s no stat that measures effort, desire or heart.  Thankfully, I guess, or the Gunners would be at the bottom of that table.  They play so gutlessly at times!
  4. The primary team stats are shown on the upper left for the last 11 EPL campaigns.  This provides a nice little recipe for what you need to do to ensure you tumble right down the table and out of the Champions League qualification spots.

    Fewer Goals For + More Goals Against = Lower Goal Differential = Fewer Points per Game = More Losses = Tumble Down the Table = No Champions League!

    In other words, if you can’t score and you can’t defend, you won’t win.  Seems pretty simple to me.
  5. Arsenal is 21 games into the 2011-12 season and only one player has more than five goals.  All other years had at least four, with the exception of 2003-04, but Thierry Henry had an exceptional season, scoring 30 goals or 41.1% of the teams’ goals.

    Click on a year and you’ll be taken to another page that list the stats for they players that scored five or more goals that season. 
  6. I charted scoring rate (goals per game) vs. % of total team goals.  This give us a way to measure a player’s total scoring importance to the team.  Guess who the outlier is at the way upper-right.  Hover over any point for more details.
  7. The bottom three charts show the number of goals, % of team goals and scoring rate for the top scorer for each season. Again, hover over any bar for more details.

As I had thought, RVP is scoring a never before seen percentage of the team goals (45%). What more proof could Wenger need that he must bring in some reinforcements?

You might say that Arsenal depended heavily on TH14 during their glory years as well, but he had a much better supporting cast, as evidenced by the number of players with five or more goals.  Plus Henry was nearly always fit, while RVP has proven to be very brittle over his tenure.

You can also look at GAA during those same years.  Arsenal was truly a “team” back then, now…not so much!

What Arsenal needs to do to turn things around is pretty simple: score more goals and defend better.  Personally, I don’t think the backline is as bad as it appears.  I blame the outside midfielders for lack of effort and not tracking back to support the defense.  If they’re going to be that lazy, they better at least score some goals. 

What Arsenal needs is another consistent goal scoring threat.  While I love Henry, I don’t think he’s the answer, especially since he’s only on loan.  A long-term solution is needed.  I fear without another formidable striker, the Gunners could easily finish outside the, gulp, top 8!