Riquelme made the announcement on El Hormiguero, telling viewers: "He has a release clause and would like to join Real Madrid. If I become president, he will play for Real Madrid."
Manchester City's response was swift and unambiguous.
"The stories which have emerged from Spain regarding the future of Erling Haaland are untrue. There is no chance of this happening and there is no contractual clause to enable it. We are considering legal action for the use of our player image in this context."
Haaland's father and former professional footballer Alfie Haaland and the player's agent Rafaela Pimenta issued their own joint denial within hours of the broadcast.
"All very entertaining but not true. We wish all the best for both candidates in the Real Madrid elections."
Riquelme also pledged to sign Spain midfielder Rodri, the 2024 Ballon d'Or winner, claiming to have spoken to his representative. Rodri plays alongside Haaland at City and has publicly declined to address speculation about his future until after the World Cup.
The episode has generated widespread ridicule in Spain and provided incumbent Florentino Pérez — the strong favourite to win Sunday's vote — with a clear political target. Pérez said he did not believe a word of Riquelme's promises and described his entire campaign as fiction.
Riquelme subsequently produced a notarial guarantee during the same programme, pledging to pay 100 per cent of every member's annual fee — across all 100,000 Real Madrid members — if he fails to deliver either signing. The guarantee has been dismissed by legal experts as unenforceable.