John Polyzogopoulos

P: 416-593-2953
F: 416-594-5083
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  • Called to the Bar of Ontario, 2000
  • LL.B., Osgoode Hall Law School, 1998
  • B.A., Economics, University of Toronto, 1995
John Polyzogopoulos Photo ©2021 Blaney McMurtry LLP

John helps clients solve their business and personal disputes:

  • Corporate and Commercial Litigation - Business partner and shareholder disputes, breach of contract, environmental contamination disputes, franchise disputes, debt collection, commercial tenancy disputes, construction disputes, real estate disputes, product liability, bankruptcy and receiverships
  • Estate Litigation - Disputes between heirs/beneficiaries and executors/estate trustees
  • Sports law - representing amateur hockey and soccer associations from the local to the national level, as well as athletes regarding internal governance, discipline and dispute resolution
  • Family Litigation – Corporate divorce between spouses (when their business and marriage partnership both dissolve)

John helps clients resolve their disputes in a variety of ways:

  • Going to court, private arbitrations and other tribunals
  • Negotiation
  • Mediation

John’s court and tribunal experience:

  • Supreme Court of Canada
  • Ontario Court of Appeal and Superior Court
  • Administrative tribunals and private arbitrations

Other types of matters John helps his clients with:

  • Appeals – John has developed a reputation as being among the most knowledgeable lawyers in Ontario regarding the Ontario Court of Appeal
  • Professional Negligence and Discipline – accountants, lawyers, engineers, real estate agents, financial advisors, insurance brokers, dental hygienists and others
  • Defamation and Breach of Privacy
  • Enforcing Foreign Judgments
  • Injunctions and other Extraordinary Remedies

John is the editor of the firm’s Commercial Litigation Update newsletter and a blog entitled “Blaneys Appeals”, which is dedicated to summarizing all civil law decisions released by the Court of Appeal for Ontario on a weekly basis. The blog receives several thousand reads a month and is circulated widely through various legal information media, including Mondaq, Lexology, CanLii and the OBA website.

  • LL.B., Osgoode Hall Law School, 1998
  • B.A., Economics, University of Toronto, 1995
 Practice Areas  Called to the Bar
  • Called to the Bar of Ontario, 2000
 Assistant  Experience
  • Halton Standard Condominium Corp No 627 v Grandview Living Inc, [2015] OJ No 7060 (QL) (Ont Sup Ct J) -

    Successfully represented a developer against a condominium board in a precedent-setting case

  • Voudouris v Appeal Tribunal of the Certified General Accountants' Assn of Ontario, 2014 ONSC 1865 (Ont Div Ct) -

    Successfully overturned a wrongful conviction of an accountant for professional misconduct

  • British Columbia (Securities Commission) v McLean, 2013 SCC 67 -

    Acted in an intervention on a securities law issue before the Supreme Court of Canada

  • General Electric Canada Real Estate Financing Holding Co v Liberty Assisted Living Inc, 2011 ONSC 6199 -

    Acted for GE in enforcing its security, appointing an investigative receiver and obtaining a non-dissipation order against the debtors

  • Nunavut (Department of Community & Government Services) v Northern Transportation Co, 2011 NUCJ 4, 2010 NUCJ 5 -

    Effectively represented the Government of Nunavut (GN) in a complex multi-million dollar products liability claim brought by the GN against the suppliers of defective gasoline that damaged over 2,000 snowmobiles owned by Inuit and other residents of Nunavut

  • Brisbin v Lunev, 2011 ONCA 15 -

    Acted for a prominent architectural firm in a contractional dispute that involved jurisdictional issues

  • Rannala v 1213321 Alberta Ltd, 2009 ONCA 659 -

    Acted for the plaintiff vendors in a dispute with the purchaser of the shares of a large kitchen cabinet manufacturer

  • West Hill Minor Hockey Assn v Scarborough Hockey Assn, [2009] OJ No 2171 (QL) (Ont Sup Ct J) -

    Acted for the Greater Toronto Hockey League, the world’s largest hockey league, in an internal governance dispute between the Scarborough Youth House League and West Hill Minor Hockey Association

  • Le Maitre Ltd v Segeren (2007), 33 BLR (4th) 224 (Ont Sup Ct J) -

    Successfully stopped a multi-million dollar transaction from proceeding at the behest of one shareholder who had not consulted or obtained approval for the deal from his client, resulting in a leading decision on the test for obtaining an injunction against a co-shareholder

  • Frayne v Holburn Business Systems Corp (2007), 156 ACWS (3d) 518 (Ont Sup Ct J) -

    Obtained a rare order for interim legal costs to be paid to his client by the other side before the case was to even be heard

  • Frontenac Ventures Corp. v Ardoch Algonquin First Nation, [2007] OJ No 3360 (QL) (Ont Sup Ct J) -

    Represented a First Nations band involving the blockade of uranium exploration on disputed aboriginal lands

  • Antonopoulos v Antonopoulos, [2006] OTC 105 (Ont Sup Ct J) -

    Successfully acted for husband in setting aside an order freezing the proceeds of sale of his interest in a business

  • Acted for a receiver to investigate and put into bankruptcy an individual who had perpetrated a multi-million dollar Ponzi scheme fraud, as reported on CBC's "The National"



  • Voted by Lexology as the Legal Influencer in Canada in Q4 2018, Q1 2019, Q3 2019, Q4 2019, Q2 2020, Q1 2021, Q3 2021 and Q2 2022 for his contribution to the weekly blog, Blaneys Appeals. 
 Speaking  Publications
 In the Media  News

Blog Posts



  • Law Society of Ontario
  • Past Chair, Civil Litigation Section Executive, Ontario Bar Association
  • The Advocates’ Society
  • Toronto Lawyers Association
  • Member and Past President, Hellenic Canadian Lawyers’ Association


  • Former Director, Hellenic Heritage Foundation, a charitable organization
  • Former Mentor, Ryerson University Law Practice Program, Law Society of Ontario Lawyer Licensing Program
  • Former Director, Pro Bono Community Legal Clinic, Hellenic Canadian Lawyers’ Association/Greek Community of Toronto/Pro Bono Law Ontario


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