Ronald Koeman will get his first taste of El Clasico from a dugout when Barcelona host Real Madrid on Saturday.

The LaLiga champions head to Camp Nou after a pretty rotten week in which back-to-back home defeats to Cadiz and Shakhtar Donetsk have left fans and pundits alike thoroughly disillusioned with Zinedine Zidane's current approach.

Barca also lost 1-0 in their previous league game, away to Getafe, but a 5-1 thumping of Ferencvaros in the Champions League was a tonic and, in truth, that defeat at Coliseum Alfonso Perez felt more like an aberration during what has mostly been an encouraging start under Koeman.

The Clasico is always the acid test, though – and Barca, barring a dramatic change in system, will line up for this one in a 4-2-3-1 formation, something they have not done for at least the previous 46 meetings.

BREAKING THE WHEEL

Nobody need tell Koeman about Barca's traditional adherence to 4-3-3. He had enough experience as a player for the Netherlands and the Blaugrana to know such a system like the back of his hand, even if Johan Cruyff's peak 'Dream Team' – such as the one that won the 1992 European Cup final through a Koeman extra-time goal – thrived instead in a 3-4-3.

The fact is, though, that Barca have doubled down on 4-3-3 since Frank Rijkaard took charge in 2003. He, Pep Guardiola, Tito Vilanova, Gerardo Martino, Luis Enrique, Ernesto Valverde and, eventually, Quique Setien – all have either stuck religiously to the system or at least made good use of it.

That rings true in the Clasico, too. Since the 2005-06 season, there have been 46 matches between Barca and Madrid in all competitions, and Barca have started in a 4-3-3 in 39 of them. Four games have seen them set up in a 4-4-2, and one each in 3-4-3, 3-5-2 and 4-3-1-2.

It's yielded mixed success, as you might expect. Barca won 17 of those 39 games in 4-3-3 – a 43.6 per cent winning rate – and lost 12. They scored 71 goals and conceded 53.

In 4-4-2, they won twice, drew once and lost once, scoring eight goals and conceding four. The 3-4-3 was, fittingly, a 3-3 LaLiga draw in October 2007; the 4-3-1-2 was that famous 3-2 win for Barca at the Santiago Bernabeu under Luis Enrique in 2017, when Lionel Messi scored his 500th club goal; and the 3-5-2 was used by Valverde when they lost 2-0 in the Supercopa de Espana second leg in the capital three years ago.

Koeman's set-up, then, is a big departure from the norm. But will it work against Madrid?

FATI AND FRENKIE ON FIRE

Koeman explained this month that 4-2-3-1 was preferable because of Barca's lack of wingers. "Looking at the quality that we have, this formation is perfect for the team," he told Barca TV.

Fans may not have warmed to the idea at first, but Koeman's approach makes sense – and there are certain players thriving in this formation.

For one thing, it gets Ansu Fati involved closer to goal. In four league games, the young Spain star has attempted 15 dribbles, created three chances and scored three goals. The freedom to cut inside from the left has also liberated Jordi Alba and Sergino Dest at left-back, each of whom have also created three goalscoring chances. Given Madrid presently have no fully fit right-backs, that should worry Zidane.

Another to benefit is Frenkie de Jong, a player who admitted to underwhelming in his first season after joining from Ajax for an initial €75million. He has performed positively in a central axis, usually alongside Sergio Busquets, asserting himself in games far more even though Barca's average possession figure has dropped to 59.2 per cent, lower than in any of the past 11 seasons.

He, too, has created three goalscoring chances and has a remarkable 100 per cent success rate from 11 attempted dribbles. He has also completed 216 passes, behind only the more possession-focused Gerard Pique (255) and Busquets (261). He is a player with renewed confidence in breaking lines in transition and getting the ball into threatening areas, and Madrid's midfield three will have a real test on their hands to cover the space of Barca's four forwards while keeping De Jong quiet.

And Messi? Koeman said before the Ferencvaros game that his captain's form "could be better", and he had a point – one goal (a penalty) and zero assists from four league games is an unusually modest return. He is also averaging 3.9 shots per game, his lowest rate since 2007-08.

Still, Messi has created more chances (six), attempted more dribbles (19) and more shots (15) than any other Barca player in the league this season, and he may be about to face a Madrid defence without Sergio Ramos.