Four days ago Sergio Martínez was a name for Racing Santander supporters and little more. He made his LaLiga debut, struck a goal from outside the box, and by Wednesday night Real Madrid had a deal for him all but tied up. According to reports from MARCA and The Athletic carried by Managing Madrid, Los Blancos are closing on an agreement with Racing over the 19-year-old midfielder, with his €3 million release clause the reference point. And in the last few hours the plan itself has shifted — from a quiet loan-back to something rather more immediate.
What you will find below:
- Who Sergio Martínez is and how quickly he has risen
- The structure of the deal, and why Madrid would rather negotiate than trigger the clause
- The late turn: a Castilla licence, but life inside José Mourinho’s first-team group
- The risks in taking a one-game LaLiga sensation now rather than later
- What realistically happens before the window shuts on 31 August
Background: who is Sergio Martínez?
The rise has been startling even by the standards of Spanish football’s conveyor belt. According to AS, in reporting summarised by Managing Madrid, Martínez has gone from youth football at Racing to making an impression with the senior side in the space of roughly seven months. He turned 19 in May. Last weekend he made his first appearance in the top flight and scored, a strike from distance that announced him to an audience far beyond Cantabria.
Bernabéu Digital describe him as one of the sensations of a LaLiga season that is a single matchday old, and one of the reasons behind the resurgence of a newly promoted Racing. Physically he is unusual for his age: around 1.85 metres, per the AS profile, with the frame to operate in deeper areas and enough on the ball to play further forward. Versatile through the middle, in other words, which is precisely the sort of profile Madrid have hunted in the academy market for years.
Crucially, this is not an impulse buy off the back of one highlight. AS report that Madrid had been monitoring his development before the breakthrough into senior football and have compiled reports on him over recent months. They are not alone, either: the same report lists Barcelona and Villarreal among the clubs whose attention he has attracted.
The deal: how Real Madrid are structuring the Sergio Martínez signing
A €3 million clause — that Madrid would rather not pay
The number that makes this possible is small. Martínez’s release clause stands at €3 million, according to both the AS and MARCA/The Athletic reports. Managing Madrid’s account of the MARCA and Athletic reporting has Madrid ready to trigger it. The nuance, per AS, is that the club would prefer to negotiate directly with Racing rather than go down that route — a cheaper deal in relationship terms, if not in cash, with a club Madrid will want on good terms if a loan is involved.
Bernabéu Digital, citing the well-connected José Félix Díaz of AS and Ramón Álvarez de Mon, went further on Wednesday afternoon: the interest is entirely serious, terms with the player are not expected to present difficulties, and the board are working towards an understanding with Racing so the clause never has to be used. In their words, Madrid have the signing effectively tied up.
Castilla on paper, first team in practice
Here is where it gets interesting for Madridistas. The registration plan reported across every outlet is the same: Martínez would be signed as a Real Madrid Castilla player rather than take up a place in the senior squad. Managing Madrid’s summary of MARCA and The Athletic adds that Mourinho could nevertheless decide to have him train with the first team.
Late on Wednesday, Bernabéu Digital reported that this has hardened into a genuine option under study at Valdebebas. Their piece describes a formula in which the 19-year-old holds a Castilla licence but works with, and is regularly available to, Mourinho’s first-team group — giving the coach access to him without spending one of the places reserved for the senior squad. His performance and how quickly he settles would then determine how much he actually plays.
The turn away from a loan
That represents a change from what was being briefed only hours earlier. Bernabéu Digital, citing Mario Cortegana, reported on Wednesday evening that the plan was for Martínez to begin at Castilla, but that if Racing could promise him serious minutes he might be left on loan at the newly promoted club for the season to develop in the top flight. The initial thinking, per their later piece, even stretched to one or two seasons back in Santander.
What has changed, on that account, is the level of confidence inside the club. Enough of it, apparently, to consider having him around from day one. The operation is described as very advanced with one significant detail left to settle: keep growing in Santander, or start now under Mourinho.
The challenges: why this is not a straightforward win
Two counter-arguments deserve airing. The first is the sample size. This is a teenager with one LaLiga appearance to his name. A spectacular one, but one. AS’s reporting is careful to note that Madrid’s belief is built on months of scouting rather than a single goal — and the club will know how many wonderkids have arrived at Valdebebas on the back of a viral moment and never reached the first team.
The second is the reserve-team question. Managing Madrid’s summary of AS raises it directly: having broken into senior football and made an immediate impression, dropping back into reserve-team football could complicate his progress rather than help it. There is a reason the loan-back option existed in the first place.
And then there is the small matter of expectation. As Bernabéu Digital put it in their own analysis, this is not the marquee midfield reinforcement many had been waiting for — a signing for the future rather than a solution for the present. Madrid’s summer in that department has been well documented, from the collapse of the Rodri pursuit to the way the rest of the midfield market played out. A €3 million teenager does not change that; it is a different kind of business entirely.
Outlook: what happens before 31 August
The window closes on 31 August, which gives all parties a fortnight of runway. On the reporting available, three outcomes are live:
- Signed and loaned straight back to Racing — the original plan, preserving a full season of LaLiga minutes.
- Signed and registered with Castilla — the conventional route for a young arrival, with promotion earned from below.
- Signed, Castilla licence, first-team dynamic — the late option Bernabéu Digital report is now under consideration, and the one that would tell you most about how highly Madrid rate him.
None of it is official yet, and nothing here should be read as a completed transfer. What is consistent across MARCA, The Athletic, AS and the Spanish desks is direction of travel: Madrid want him, the fee is modest, the player is willing, and the negotiation with Racing is about structure rather than whether it happens. It also fits a wider pattern — a club that has spent this summer reshaping its academy economics and looking hard at young Spanish talent.
The verdict for Madridistas
For €3 million, this is the sort of move that costs almost nothing to get wrong and looks inspired if it comes off. The intrigue is not the fee but the framing: a 19-year-old who was in youth football at the start of the year being talked about, seriously, as somebody Mourinho might want in his group by the end of the month. Keep an eye on the final call between Santander and Valdebebas — and on Saturday’s opener at Espanyol, where the season proper begins regardless. For the earlier reporting on how this one started, see our piece on Madrid’s interest in the Racing Santander midfielder.
