El ColegiadoData on refereeing in the Liga

Alfonso Álvarez × Gorka Iraizoz

22 matches of Gorka Iraizoz (Athletic Bilbao) refereed by Alfonso Javier Álvarez Izquierdo, from 2007-08 to 2016-17.

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Player data: 2000-01 → 2021-22 only. Player-level match sheets come from Zenodo (BeSoccer, CC BY-NC 4.0 licence, non-commercial use). No free source provides them after 2021-22: more recent matches are not counted here. Penalties conceded are not attributed to players in the source, so they are not analysed.

In short

Alfonso Álvarez refereed 22 Liga matches in which Gorka Iraizoz took part, from 2007-08 to 2016-17: 1,980 minutes played, 0 yellow cards and 0 red cards. With the other referees, over the same seasons (286 matches, 25,526 minutes), Gorka Iraizoz receives 0.07 yellow cards per 90 minutes, against 0.00 with Alfonso Álvarez.

Verdict: no clear difference with the other referees.

Cards are rare (less than one per player per match): over a few dozen matches, only a very large deviation can be told apart from chance. "No clear difference" does not mean "no effect".

Matches

22

22 starts · 1,980 minutes · 10 seasons

Yellow cards

0for 1.3 expected

0.00 per 90 minutes with this referee · 0.07 with the others

no clear difference

Red cards

0for 0.1 expected

0.00 per 90 minutes with this referee · 0.00 with the others

no clear difference
For experts: statistical tests and method

Permutation test stratified by season: within each season, the player's matches given to this referee are drawn again at random among all the player's matches (same number per season). Deviation = (observed − expected cards) per 90 minutes played with this referee; positive = more cards than expected. q: Benjamini-Hochberg correction over the 3,781 pairs with at least 10 matches, separately for yellows and reds.

MeasureObservedExpectedDeviation / 90 minpqVerdict
Yellow cards01.28−0.0580.421.00no clear difference
Red cards00.08−0.0041.001.00no clear difference

The 22 matches

Minutes played and cards received by Gorka Iraizoz in each match refereed by Alfonso Álvarez.

DateMatchTeamMinutesYellowsReds
30 Sept 2007Villarreal CF 1-0 Athletic BilbaoAthletic Bilbao0′ → 90′00
26 Oct 2008Real Madrid CF 3-2 Athletic BilbaoAthletic Bilbao0′ → 90′00
15 Feb 2009Athletic Bilbao 1-1 Recreativo de HuelvaAthletic Bilbao0′ → 90′00
23 Sept 2009CD Tenerife 1-0 Athletic BilbaoAthletic Bilbao0′ → 90′00
7 Feb 2010Athletic Bilbao 3-2 Xerez CDAthletic Bilbao0′ → 90′00
18 Sept 2010Sporting de Gijón 2-2 Athletic BilbaoAthletic Bilbao0′ → 90′00
6 Mar 2011Athletic Bilbao 2-0 Sevilla FCAthletic Bilbao0′ → 90′00
21 May 2011Racing de Santander 1-2 Athletic BilbaoAthletic Bilbao0′ → 90′00
8 Jan 2012Getafe CF 0-0 Athletic BilbaoAthletic Bilbao0′ → 90′00
11 Mar 2012CA Osasuna 2-1 Athletic BilbaoAthletic Bilbao0′ → 90′00
8 Apr 2012Athletic Bilbao 1-0 Sevilla FCAthletic Bilbao0′ → 90′00
25 Nov 2012Athletic Bilbao 1-1 Deportivo de A CoruñaAthletic Bilbao0′ → 90′00
30 Sept 2013Granada CF 2-0 Athletic BilbaoAthletic Bilbao0′ → 90′00
28 Feb 2014Athletic Bilbao 4-0 Granada CFAthletic Bilbao0′ → 90′00
27 Apr 2014Athletic Bilbao 3-1 Sevilla FCAthletic Bilbao0′ → 90′00
29 Nov 2014Getafe CF 1-2 Athletic BilbaoAthletic Bilbao0′ → 90′00
25 Jan 2015Athletic Bilbao 1-1 Málaga CFAthletic Bilbao0′ → 90′00
4 Apr 2015Sevilla FC 2-0 Athletic BilbaoAthletic Bilbao0′ → 90′00
6 Dec 2015Athletic Bilbao 0-0 Málaga CFAthletic Bilbao0′ → 90′00
13 Feb 2016Real Madrid CF 4-2 Athletic BilbaoAthletic Bilbao0′ → 90′00
14 May 2016Athletic Bilbao 3-1 Sevilla FCAthletic Bilbao0′ → 90′00
5 Mar 2017Athletic Bilbao 1-0 Málaga CFAthletic Bilbao0′ → 90′00

↑: came on as a substitute. Stoppage time is not recorded in the source: minutes stop at 90.

Gorka Iraizoz with other referees

  • Mateu Lahoz22 matches
  • David Fernández Borbalán18 matches
  • Undiano Mallenco18 matches
  • Carlos Velasco Carballo17 matches
  • Del Cerro Grande16 matches
  • Carlos Clos Gómez16 matches
  • Estrada Fernández16 matches
  • César Muñiz Fernández16 matches
  • Iglesias Villanueva15 matches
  • Fernando Teixeira Vitienes15 matches
  • Ramírez Domínguez12 matches
  • José Antonio Teixeira Vitienes12 matches
  • Ayza Gámez10 matches
  • Pérez Montero10 matches