With El Clasico looming on the horizon, reigning champions Madrid were stunned by newly promoted Cadiz as LaLiga resumed on Saturday following the international break.
However, Barca missed the chance to move level on points with their rivals ahead of next Saturday's showdown at Camp Nou.
Jaime Mata's 56th-minute penalty was enough for Getafe to secure a first league win over their illustrious opponents since a similar 1-0 result back in November 2011, a run of 16 games.
Lionel Messi struck a post and Getafe captain Djene Dakonam was spared from scoring an own goal by the crossbar, but - after starting his reign with back-to-back wins - Koeman has now seen his side pick up a solitary point from their next two outings, laying bare the size of the task on his hands.
Ousmane Dembele made his first start of 2020 and there was also an opportunity handed to teenager Pedri from the outset, suggesting the new boss will show faith in youth during the rebuilding job required.
Still, it is a big-money signing who will once again come under the spotlight, Antoine Griezmann squandering his team's best chance to leave him still without a goal at club level in the early stages of the 2020-21 season.
The French forward wastefully blasted over when clean through in a first half consistently punctuated by the sound of referee Cesar Soto Grado's whistle, with five players shown yellow cards.
Getafe had rarely threatened before Frenkie de Jong helped them out, the midfielder clumsily catching Dakonam inside the area as he rushed in attempting to win the ball.
Mata duly converted from the spot – sending Neto the wrong way – and the dogged hosts held firm to their slender advantage through to the final whistle.
In an eventful finish to proceedings not in keeping with the rest of the contest, Juan Hernandez blazed over at one end before Getafe were saved by the woodwork in stoppage time, Barca unable to find a late leveller their performance scarcely merited.
Using Opta data, we have already examined some of the worst attacking, passing, defending and goalkeeping numbers from 2019-20, but who has been letting the side down with shoddy discipline.
We have analysed five metrics for players now operating under the increasing scrutiny of VAR across the elite divisions.
These include the worst offenders in terms of fouls conceded, penalties conceded, offsides, yellow cards and red cards.
Check out our list of shame below, which is not the who's who of hotheads you might expect, while a lack of minutes on the field does not necessarily mean a player cannot irritate the officials.
THE WORST FOUL STATS IN EUROPE'S TOP-FIVE LEAGUES 2019-20:
BUNDESLIGA:
Most fouls conceded: Robert Andrich (52)
Most penalties conceded: Dedryck Boyata (3)
Most offsides: Timo Werner (35)
Most yellow cards: Klaus Gjasula (12)
Most red cards: Leon Bailey (2)
LALIGA:
Most fouls conceded: Jaime Mata (67)
Most penalties conceded: Ruben Duarte (4)
Most offsides: Alvaro Morata (28)
Most yellow cards: Gerard Pique (12)
Most red cards: Facundo Roncaglia, Zouhair Feddal, Clement Lenglet (all 2)
LIGUE 1:
Most fouls conceded: Andy Delort (69)
Most penalties conceded: Mathieu Debuchy (3)
Most offsides: Victor Osimhen (33)
Most yellow cards: Nicolas Pallois (10)
Most red cards: Ruben Aguilar, Racine Coly, Steven Moreira, Boubakary Soumare, Marcal, Anthony Briancon, Jacques-Alaixys Romao (all 2)
PREMIER LEAGUE:
Most fouls conceded: Etienne Capoue (47)
Most penalties conceded: David Luiz (3)
Most offsides: Chris Wood (31)
Most yellow cards: Jorginho (10)
Most red cards: Christian Kabasele (2)
SERIE A:
Most fouls conceded: Sergej Milinkovic-Savic (52)
Most penalties conceded: Koray Gunter (3)
Most offsides: Cristiano Ronaldo, Rodrigo Palacio (both 21)
Most yellow cards: Ismael Bennacer (12)
Most red cards: Bremer, Federico Marchetti, Pawel Dawidowicz, Armando Izzo, Davide Calabria (all 2)
AND THE TOP FIVE:
Most fouls conceded: Andy Delort(69)
Most penalties conceded: Ruben Duarte(4)
Most offsides: Timo Werner(35)
Most yellow cards: Ismael Bennacer (12 in 1,620 minutes played)
Most red cards: Federico Marchetti (2 despite not playing a single minute of Lazio's Serie A season!)
