Borja Martínez | Fieldfisher
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Professional background

Professional background

Since 2002, I have been advising companies in the field of antitrust law. I regularly support clients in interpreting and addressing practical issues related to competition rules, as well as in implementing tailored antitrust compliance programmes.

I have advised companies during antitrust inspections and in European, national and regional administrative proceedings concerning restrictive agreements — including cartels — abuses of dominant position, and matters related to mergers and investment control. I also have significant experience advising on State aid (including the Foreign Subsidies Regulation) and internal market law.

In addition, I have represented clients before the Spanish civil courts in competition-related cases, both in damages claims and unfair competition matters.

I am a regular contributor to universities and higher education institutions and the author of numerous publications on competition law in specialised media. I also serve as Secretary and member of the Board of Directors of the Spanish Association for the Defence of Competition (Asociación Española de Defensa de la Competencia).

Authored pieces

All Resources
A close-up of an LED screen displays a financial graph with a cityscape in the background. The screen shows a series of dots forming line patterns, representing data. The scene is illuminated with blue and pink lights, giving it a futuristic feel.
Corporate
Insight

Click at Your Own Risk: Antitrust Pitfalls of Online Sales Bans

24.11.2025
Luxury fashion, watches, consumer electronics, bikes, chocolates – these are just a few examples of product categories that have been subject to antitrust enforcement actions recently, with competition authorities in Europe questioning well-known brands' distribution strategies that limit sales online.
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Close-up image of several credit cards laid out flat, with focus on the raised numbers of one card in the foreground. The image is illuminated with a mix of purple and blue light, giving it a modern and tech-savvy appearance.
Public & Regulatory
Insight

BBVA-Sabadell merger collapses after unprecedented government approval

11.11.2025
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Insight

Foreign Direct Investment (FDI) Regimes in the UK and Europe – risks and opportunities 2023/2024

27.09.2023
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Close-up image of industrial turbine blades, showing a detailed view of the intricate metal components arranged in a circular pattern. The blades display various shades of blue and pink, highlighting the precision and engineering involved in their design.
Insight

Fieldfisher contributes to Chambers Alternative Energy & Power 2023 Global Practice Guide

22.08.2023
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Insight

Spain's Royal Decree 571/2023 and the energy sector

14.07.2023
The new decree clarifies which parts of Spain's energy sector are subject to foreign direct investment controls.
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