Ronald de Boer has revealed his brother, Frank, turned down an approach from Tottenham in January.
Ajax coach Frank de Boer has guided Ajax to three successive league titles since taking over at the Amsterdam Arena in 2010 and the 43-year-old's success has sparked interest from Premier League clubs.
Ronald told talkSPORT: "Frank has already denied Liverpool and Tottenham. Tottenham wanted to take him in January, but Frank said no.
"He also said no to Liverpool last year. He thought he was still not ready and wanted to learn more.
"Now he's ready, though. We'll have to wait and see (what offers he gets). It's important for Frank to get the right club otherwise he won't leave Ajax. He's very happy there."
