UEFA has warned FIFA it is considering legal action over President Gianni Infantino's abandoned plan to sell a stake in future World Cup revenues to private investors while also demanding that any evidence related to the proposal be preserved.

Infantino's controversial plan, which sought to raise $4.2 billion from investors including a New York-based investment firm led by Joshua Kushner, was quietly shelved early Saturday after media reports exposed the proposal and sparked widespread backlash across global football.

UEFA spearheaded the opposition. On Thursday, its 55 member associations met and agreed to boycott all FIFA events and competitions for as long as the proposal remained under consideration.

Lawyers representing UEFA have now formally notified FIFA that the governing body is "actively considering legal action, arbitration, and/or regulatory complaints ... arising out of and in connection with the FFE (FIFA Forward Enterprise) plan proposed by FIFA and all related matters." They also called on FIFA to ensure that all potentially relevant documents and evidence are preserved.

The letter, dated Friday, from the New York law firm Dechert was seen Monday by The Associated Press (AP).