Spurs claimed their second victory of the season to move away from the relegation zone and into 12th spot on the Premier League table following a horrendous start to the campaign.
Two second half goals were enough to hand the visitors the three points and back-to-back wins in the league after the 3-1 midweek result against Coventry City.
"The quality of the players today, Mateus Fernandes, Tonali, van der Ven, Robertson, Mathys Tel, Maddison, Gallagher - they played very well," said De Zerbi to Spurs media after the match.
"Then the quality of the play, because we created many problems for Chelsea. The mentality, because we wanted to win this game. We fought in the right way, and we made our fans and our club very happy.
"I think the key for this club, for our club, for our team, is the mentality. I think now we are improving in the mentality. There is another atmosphere, there is another connection, and another relationship with the players."
The Coys are now unbeaten in their last three matches and will turn their attention to next Saturday's clash at home against Crystal Palace.
Liverpool captain Virgil van Dijk has emphasized the importance of maintaining their winning streak ahead of Premier League clash against Brighton and Hove Albion on Sunday.
Under-pressure Manchester United head coach Michael Carrick has pushed back against criticism of his side's work rate and pressing ahead of Sunday's Premier League clash with Bournemouth.
Chelsea midfielder Moises Caicedo believes his team knows what they need to improve on following the 2-0 defeat at home against Tottenham Hotspur on Saturday.
Tottenham claimed a rare victory at Stamford Bridge as they beat Chelsea to record their second league win at the ground in 36 years.
