Alisher Usmanov, a Russian metals tycoon who is a major sponsor of Everton, has already been sanctioned by the European Union.
“We must stand up to Putin and those who prop up his regime,” Keir Starmer, leader of the opposition Labour Party, said to Johnson.
Wyss said he would only be interested in joining a “consortium consisting of six to seven investors” to buy Chelsea.
Abramovich tried to distance himself from decision-making at Chelsea for the first time on Saturday by announcing plans to shift the “stewardship and care” of the club its foundation trustees.
Judge Elizabeth Gloster said Abramovich had “very good relations” and “privileged access” to Putin though adding he could not “pull the presidential strings”.
That came at a time when Britain pledged to review the long-term visas of rich Russians in the aftermath of the poisonings of Russian former spy Sergei Skripal and his daughter in the English city of Salisbury.