Sainz was linked with Red Bull due to Sergio Perez's poor form, Sauber/Audi and Mercedes to replace Hamilton, but eventually signed a long-term contract with Williams.
While that particular driver transfer saga seemed to have ended when the four-time race winner signed his deal with Williams, recent reports have suggested that he may have a clause in his contract that would allow him to leave if Red Bull came calling.
A run of just 12 points from his last six races has seen Red Bull fall down to third in the constructors' championship, with Max Verstappen often acting like a one-man team throughout 2024.
Now, Williams have released an official statement to GPFans on the rumours surrounding Sainz's contract with the team and a potential Red Bull transfer.
"We can confirm this is not true," a senior Williams source said. "There has been no conversation regarding this - it is complete speculation from these other media sources."