Xabi Alonso is on his way to Stamford Bridge, and the question every Chelsea supporter is already asking is a simple one: what exactly are we going to look like? The noises out of the club suggest BlueCo believe the 44-year-old Spaniard is the man to finally steady the ship after years of turbulence since the 2022 takeover. On the evidence of his work at Bayer Leverkusen and, more recently, Real Madrid, there is plenty to be excited about — though the picture is more nuanced than a single system stamped on a whiteboard.

A coach driven by principles, not formations

Alonso belongs to a generation of managers for whom a rigid shape is less important than a clear set of footballing beliefs. His early work at Real Sociedad B saw him operate in a 4-2-3-1 and a 4-3-3 before he migrated towards the 3-4-3 structure that became his calling card. It was that back-five framework he deployed to stunning effect at Leverkusen, where wing-backs Jeremie Frimpong and Alejandro Grimaldo offered the width and the attacking thrust to make the whole thing sing. The result was an unbeaten Bundesliga title from a side that had been second from the bottom when he arrived.

At Real Madrid, the personnel demanded a different answer. With Kylian Mbappé, Vinicius Junior and Jude Bellingham all requiring prominent roles, Alonso largely reverted to a back four, at times experimenting with a 4-4-2 shape to accommodate the wide threat on both flanks. The spell ended in difficult circumstances — fallouts with several key figures — yet a win percentage above 71 per cent during his tenure represents a remarkable return by any measure.

The shape is fluid — and that matters for Chelsea

What makes Alonso genuinely interesting at Chelsea is how seamlessly he moves between a back four and a back five within the same match. His sides look for five players on the last line of attack in the final third, whether that comes from two wing-backs and three narrow attackers or from a four-at-the-back setup where a full-back tucks in and a winger holds the width. The key ingredient is players who understand when to drop deep, show for the ball, and recycle possession before bursting forward again.

Chelsea, as it happens, are already part-furnished for this approach. Marc Cucurella and Malo Gusto have both demonstrated the ability to shift from wide defensive roles into central attacking positions — something both Enzo Maresca and Liam Rosenior used at different points last season. Pedro Neto and Alejandro Garnacho have experience operating as wing-backs despite being natural wide forwards, giving Alonso flexibility on either flank.

Geovany Quenda could be the Frimpong role

Perhaps the most intriguing piece in the puzzle is Geovany Quenda, the Sporting wide player understood to be joining Chelsea this summer. The young attacker is comfortable as a winger or a wing-back, which means Alonso could deploy him in the Frimpong mould — pressing from high and wide, alternating between positions depending on the phase of play, and providing a constant running threat behind a defensive line.

Out of possession, Alonso's Leverkusen pressed aggressively in a 5-2-3 shape, holding a high defensive line and stepping up to squeeze the ball carrier. That intensity was harder to replicate at the Bernabéu, where several of the biggest names struggled to commit to the same work rate off the ball. At Chelsea, where the squad is younger and arguably more athletic across the pitch, Alonso may find the defensive structure easier to implement.

The wider picture

Alonso arrives without the weight of a single rigid system — he arrives with a way of thinking. He will look at this Chelsea squad, assess what the players do well individually and collectively, and build his structure around those strengths. Given the depth in wide areas and the versatility in the full-back positions, a fluid three-at-the-back system seems the most likely starting point. Whether it stays that way will depend, as it always does with Alonso, on what the players in front of him can offer.

  • Key strength: Tactical flexibility and the ability to adapt mid-match
  • Best-suited players: Cucurella, Gusto, Neto, Garnacho, and incoming Quenda
  • Biggest challenge: Instilling high-press intensity across a large, expensive squad

Frequently asked

What formation will Xabi Alonso use at Chelsea?
Alonso does not rely on a single set formation. He is most associated with a 3-4-3 or back-five system, but he adapts based on the players available and the opposition. Chelsea fans should expect fluid movement between a back four and a back five within the same match.
How did Xabi Alonso do as a manager before joining Chelsea?
Alonso took Bayer Leverkusen from second-bottom in the Bundesliga to unbeaten champions. He then managed Real Madrid, achieving a win percentage above 71 per cent — the highest of any Madrid manager in the past decade — before his spell ended following reported clashes with players.
Which Chelsea players suit Xabi Alonso's system?
Marc Cucurella and Malo Gusto are well-suited to Alonso's wing-back or inverted full-back roles. Pedro Neto and Alejandro Garnacho provide wide versatility, while summer signing Geovany Quenda could be used in the Jeremie Frimpong role that proved so effective at Leverkusen.