The mega-collector’s latest lawsuit, filed in New York, escalates his three-year legal feud with Swiss dealer Yves Bouvier

Order could pave way for Russian billionaire to launch High Court case against Swiss dealer Yves Bouvier and Sotheby’s

French shipping firm André Chenue beat US competitors to buy the 150-year-old business, as Bouvier continues to fight legal case against Dimitry Rybolovlev