However, CANAL+ claims that the Finn will replace Kimi Raikkonen at Alfa Romeo – and they reckon an announcement will come on Monday.
Alfa Romeo driver Antonio Giovinazzi is also out of contract at the end of the season so it is unclear who will partner Bottas next term.
For the vacant Williams seat, Nyck de Vries and Alexander Albon are the leading candidates.
Speaking ahead of the Dutch Grand Prix, Hamilton gave a raving review of Russell’s potential.
“I honestly think it will be good,” said Hamilton. “I think George is an incredibly talented driver, clearly.