The Frenchman joined the London club from Newcastle back in 2016 and he has been a useful member of the squad ever since.
Sissoko had fallen down the pecking order at the London club over the past year and he needed to leave in search of regular first-team football. The Frenchman was being linked with an exit since the start of the summer.
The 71 cap French international has played over 200 games for Tottenham and he will be looking to make a fresh start at the newly-promoted club now.
The 32-year-old was also the inaugural winner of the Tottenham Hotspur Legends’ Player of the Season award in 2019. He will wear the number 19 shirt at Watford.
Tottenham have confirmed the transfer on their official website.
Watford needed to add more quality and depth in the central midfield as they are making comeback to Premier League after a year in Championship. Sissoko could prove to be a quality addition for them.
Tottenham have quite a few options at their disposal in the middle of the park and they are being linked with other midfielders like Ilaix Moriba.
Sissoko would have struggled for game time at the London club this season and his move to work for would be ideal for his own career. This is the best time for the two parties to part ways.
The Frenchman will not only contribute creatively in the middle of the park, but his ability to help out offensively will also be an added bonus for the Hornets.
The hard-working Frenchman can help out defensively with his work rate as well.