Chelsea has officially appointed Xabi Alonso as Manager of the men’s team, and he’ll begin his role on 1 July 2026, having agreed a four-year contract at Stamford Bridge. He arrives having led Bayer Leverkusen to the first unbeaten Bundesliga season in German history, and after a brief, turbulent stint at Real Madrid that ended in January.

The appointment is a statement, but what will Chelsea look like under him, and does the current squad fit?

How Xabi Alonso Sets Up His XI

Alonso is well known for his 3-4-2-1 wide formation, but it has more nuance. The shape shifts through the phases, and every role demands well-drilled players.

The build-up: a 3-2-5 box

In possession, his Leverkusen morphed into a 3-2-5. 3 CBs spread wide, a double pivot dropped in front, and five attackers stretched the last line. The 2 midfielders are key to building and defending counter-attacks.

This is Alonso’s geometry of control — built around his belief that if you win the midfield, you probably win the game.

The wing-backs are forwards in disguise

The single most important thing to understand about an Alonso XI is that the wing-backs are the offensive engine. Grimaldo and Frimpong were responsible for nearly half of Leverkusen’s league goals. While Reece James is well-suited, and Cucurella is poised to leave, we should target bringing back Lewis Hall from Newcastle. Quenda on the right-hand side can provide backup, since Gusto’s attacking stints have gone down massively since the last season.

The pivot is the spine

Alonso wants two complementary midfielders: one ball-progressor with composure and range, and one mobile ball-winner who breaks play and covers ground. The balance is non-negotiable — you don’t get one without the other. While Caicedo will play the mobile ball winner, Enzo [if he stays] will play the ball progressor. Lavia is very well suited for the role, but his injury-laden history makes it highly risky to rely on him. Chelsea should aim to bring in Elliot Anderson if Enzo departs.

The two 10s and the striker

Behind the centre-forward, Alonso wants two creators in the half-spaces — Wirtz-like profiles who can drift wide to overload flanks, drop deep to combine, or arrive late in the box. Palmer and maybe Estêvão can play here. But the system holds as long as we’ve backup players — only Neto worth given a shot.

The striker needs to lead the press, hold up play, and finish as a complete forward. Joao Pedro and Jackson, if not let go, can be used as backup to prove the system initially.

Out of possession: the 5-2-2-1

On loss of possession, the wingbacks fall to create a back 5 while the box players try to block the play from the middle. Defensive coordination and playing out of the back being key, Chelsea needs to massively improve from losing the ball in key areas. It all falls on the keeper, and usually, we concede.

The tempo philosophy

What separates Alonso is rhythm. His teams use slow, horizontal passing — waiting for an opponent to miss, then shifting instantly into vertical mode. To seamlessly implement this, Chelsea’s wingbacks have to be massively fit to keep attacking from the flanks.

Alonso failed to succeed in Real with a back four, and we’re already watching Chelsea play a back 3. The quicker we adapt and function with the discussed detail, the sooner we see silverware. Leverkusen had not seen a trophy in 120 seasons; Alonso took 2 years to do it.