Dele Alli and Harry Kane gave Spurs a two-goal lead within 16 minutes and Sarri admitted that he had not anticipated a changed Spurs line-up which allowed them to put pressure on Jorginho in the midfield.
Substitute Olivier Giroud added a late consolation for Chelsea but Spurs' win moved them on to 30 points, now two clear of their London rivals.
Here's how we rated the Blues. We played direct and scored an early goal.
Spurs were undefeated at home throughout the 2016-17 campaign and beat Manchester City, Chelsea, Arsenal and Manchester United in front of their own fans as they finished second behind Antonio Conte's Blues.
Sane's double along with goals from David Silva and Raheem Sterling helped City record their eighth consecutive victory.
Manchester City continued its dominant run in Premier League on Saturday at the expense of a sorry West Ham side while Liverpool also produced a masterful display to edge past Watford in a one-sided game.More news: Netanyahu says new elections would be 'irresponsible'
"I think that we had a lot of problems and we have to work on a lot of the actions".
"I think it was because between the staff, players and the fans we created an fantastic energy and the belief was massive.
In the last three matches, we had problems with our approach", Sarri insisted, quoted by the Mirror. "Of course Harry Kane is the best English striker in the moment, so a very important player, but if I have to say another name, I like very much [Christian] Eriksen", he admitted.
"The first goal was brilliant football and the free kick from Trent was a dream".
Alexander Mitrovic scored twice, including the victor, as Fulham responded to the arrival of manager Ranieri with a 3-2 win over fellow strugglers Southampton, ending a run of seven straight defeats.
United actually went up to 7th in the table with Bournemouth yet to play, and they're now behind Everton after the Toffee's 1-0 win over Cardiff City, but there was mixed news elsewhere.
Jamie Vardy earned a point with a second-half penalty as Leicester drew 1-1 at Brighton, despite playing more than an hour with 10 men after the sending-off of James Maddison.