Davinson has impressed in his 31 appearances this season, with Spurs manager Mauricio Pochettino suggesting he could one day become one of the best in the world in his position.
The news follows on from confirmation of a new deal for defender Kyle Walker-Peters.
The future of manager Pochettino, though, remains subject for debate.
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He also told chairman Daniel Levy - famed for his low-priced transfer deals and strict wage structure - he needed to "take risks and be brave" to end the club's hunt for silverware.
The Argentinean hopes to be granted up to £150m this summer as the north London club look to bridge the gap to the Premier League's top two.
The former Southampton manager again refused to give any guarantees he would be Tottenham boss for the start of next season.
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Rose added: "It is a season where I have had to be patient and be mentally positive".
"I've enjoyed it so much this season because I have quality team-mates, I have quality staff guiding me and I have a quality training ground to work at", Sanchez said on Tottenham's official website.
"I think Pochettino is well down the track of becoming a Tottenham legend and moving across London to a club which is competing very closely, that isn't a logical move".
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