Today it's time to say goodbye and it's hard to find the right words," Tonali wrote.
He expressed particular gratitude toward the behind-the-scenes staff at the training ground and the management team that aided his development.
Tonali then addressed the Newcastle supporters directly, reflecting on their unwavering presence at St James' Park during difficult times, which included a 10-month ban for breaching betting rules.
"When things were hard for me, you were there. Not for one day did I feel alone," Tonali said.
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He highlighted the historic significance of winning the 2025 Carabao Cup, which ended Newcastle's 70-year wait for a domestic trophy.
"Together, we achieved something this city had been waiting decades for. At Wembley that day, it was special," Tonali added.
The midfielder concluded his farewell by acknowledging how his personal life became intertwined with the city, where his son was born.
"The game brought me to Newcastle. Today I leave with my wife and our son, born during my time here.
This city gave me more than football," Tonali said.
Manager and Club Reaction
Tottenham head coach Roberto De Zerbi expressed great enthusiasm for the signing, noting that he had tracked the midfielder since his early career in Italy.
"Sandro is a special player and a great signing for our club.
I have followed him for a long time, as he came through the youth system at my hometown club, Brescia," De Zerbi said.
