“What I appreciate most is that he looks for solutions that precisely meet my needs on complex subject matters. This requires an open mind, the ability to think differently, and above all to think outside the box, to avoid simplistic or easy solutions, and to have the technical expertise that allows to come up with solutions others don’t think of. I have used him on a very complex subject matter, trade commodity finance, and maritime law and he was excellent. He sets himself apart from the classic solutions that you can immediately think of, and more importantly, looks for things other lawyers won’t think of. In law, there’s no such thing as a one-size-fits-all solution, so he’ll distinguish the right solution from the rest.”

Thomson Reuters Stand-out Lawyers 2024

Ioannis Alexopoulos is an excellent and poised strategist and leader.”

The Legal 500 UK 2024

Strategic thinker.”

The Legal 500 UK 2024

Very bright and strategic.

Chambers Global 2023

“Ioannis is the definition of a smooth operator – he keeps everyone motivated and knows what tactics to employ.”

Chambers UK 2023

“Ioannis Alexopoulos brings long-standing experience in high-value commercial disputes seated across various jurisdictions. He is also adept at handling BIT claims.”

Chambers UK 2023

Ioannis Alexopoulos leads a bright and dedicated team. Ioannis, in particular, brings his exceptional experience to bear in making smart strategic calls during challenging cases.”

The Legal 500 UK 2023

Ioannis Alexopoulos is a very experienced banking litigator.”

The Legal 500 UK 2023

Ioannis Alexopoulos, a senior partner and his team are excellent.”

The Legal 500 UK 2023

Ioannis Alexopoulos is a highly experienced litigator and has superb commercial and practical sense.”

The Legal 500 UK 2023

“He is the team leader and a great professional.”

Chambers Global 2022

“He consistently produces extraordinary, excellent work and he fills the client with great confidence and comfort.”

Chambers Global 2022

Ioannis Alexopoulus is always able to pick the best team to handle different assignments, even in other jurisdictions – he is very well connected.”

The Legal 500 UK 2022

“A very experienced and creative lawyer, who is able to think out of the box. We really appreciate working with him, because he is efficient and focused.”

The Legal 500 UK 2022

An excellent arbitration lawyer, who is smart, efficient and very responsive.”

The Legal 500 UK 2022

Ioannis Alexopoulos is a thoughtful lawyer with a real technical mastery of banking law.”

The Legal 500 UK 2022

“Group head Ioannis Alexopoulos is experienced in cases involving Greece, the Balkans, Central Asia, the Middle East, Brazil and sub-Saharan Africa.”

The Legal 500 UK 2021

Ioannis Alexopoulos is a brilliant advocate“.

The Legal 500 UK 2021

“Well known for joint venture and shareholder disputes, business break-ups and fraud and banking disputes”

The Legal 500 UK 2020

Ioannis “has great experience, clear thinking and iron logic”.

The Legal 500 UK 2017

A “highly rated litigator“.

The Legal 500 UK 2019

Ioannis is described as a “very strong lawyer”.

The Legal 500 2017

Ioannis is commended for his ability to “see right to the heart of sprawling banking disputes.

Chambers Global 2018


Ioannis specialises in commercial litigation and international arbitration, including banking disputes, particularly those involving financial products, investment banking and derivatives, and also in commercial and business disputes with an emphasis on joint venture and shareholder disputes, shareholder protection, business break-ups and fraud.

His key industry sectors are financial services, energy/oil & gas, shipping/international trade, telecoms, IT and infrastructure projects. He often advises in circumstances where these sectors overlap. The key geographies for Ioannis’s practice are Greece, the Balkans, the Middle East, Brazil and sub-Saharan Africa. He also has considerable experience of regulatory and internal investigations.

His cases often involve an international element, usually with competing multiple jurisdictions and laws. His clients include banks, insurers, intermediaries, venture capitalists and equity investors and large corporates in England and internationally.

Ioannis is ranked in the Chambers UK 2024 Guide for international arbitration. The Guide describes him as “highly experienced and an excellent strategist” with “sharp analytical skills“. Previous guides have noted that he “consistently produces extraordinary, excellent work and he fills the client with great confidence and comfort”. He is further described as “adept at handling BIT claims” and “is very experienced and brings a wealth of knowledge to the field.” He is also recognised in The Legal 500 UK 2024 as a ‘Leading Individual’ for civil fraud and international arbitration, and he is praised for being “an excellent and poised strategist and leader.” The Guide notes that he is an “expert in matters involving Greece, the Balkans, the Middle East, Brazil, and sub-Saharan Africa.” Past guides also commend Ioannis as a “highly rated litigator” and noted “is well known for joint venture and shareholder disputes, business break-ups and fraud and banking disputes“. He has been further is commended for being “a great litigator who offers his advice on the basis of the commercial goals that clients set“.

Ioannis is also ranked in Chambers Global 2023 for his international arbitration practice. Chambers notes “he consistently produces extraordinary, excellent work and he fills the client with great confidence and comfort.” Ioannis is also recognised in Who’s Who Legal 2022 Arbitration Guide. He has been described as “well recognised for his top-notch arbitration practice among peers who say he is “very experienced and engaging with the tribunal”.”


  • Advising a natural gas exploration company on a dispute with its ENRON J. V. partner, in the High Court, Court of Appeal and ICC Arbitration.
  • Acting for banks and customers in relation to trade finance and documentary credit disputes in connection with commodity trades, including oil, metals and soft commodities.
  • Advising a US listed R.E.I.T. in connection with disputes about the financing of a J.V. concerning a major Spanish real estate development.
  • Advising depositors on 2013’s Cyprus bank collapses and actions against the government in attempts to recover damages.
  • Acted for the Greek partner in a JV with Magyar Telecom in relation to a dispute with Macedonian Telecom arising out of the privatisation of the Macedonian telecoms sector, where Ioannis had advised on the initial successful bid on privatisation as well.
  • Acting for various companies belonging to a major advertising and media group in relation to joint venture disputes and other business litigation, as well as employee fraud.
  • Advising several clients in connection with the break-up of partnerships or joint ventures or the aftermath of failed common business ventures.


English Arbitration Act: Law Commission’s progressive amendmentsSolicitors Journal – 6 October 2023

Signature hires from Squire Patton Boggs in LondonCDR News – 17 May 2021

Signature hires from Squire Patton Boggs in London – Global Arbitration Review – 10 May 2021

Pandemic places spotlight on ADR for in-house teams – International Bar Association – 5 March 2021

What the new ICC and LCIA rules tell us about the concerns of users – Global Arbitration Review – 17 November 2020

UK boutique launches Paris practiceGlobal Arbitration Review – 16 July 2020

Agreeing to arbitrate to mitigate delays caused by COVID-19Blog – 5 May 2020

It is not just and convenient for an injunction restraining arbitration proceedings to be grantedLaw360 – 9 August 2019

Koshigi Ltd v Donna Union: can an arbitrator be warm and friendly with Counsel?The Law Society Gazette – 16 April 2019

Article in relation to Koshigi Ltd v Donna UnionThe Times Law Brief – 13 February 2019

Keeping control: Resolving energy, natural resources and infrastructure disputes – Corporate Disputes – 8 January 2019

Say what you meanLawyer Monthly – 3 September 2018

Arbitrating multi-party and multi-contract disputesLexisNexis Butterworths Journal of International Banking and Financial Law – November 2018

International arbitration: a time of changeIBA Global Insight – November 2018

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