SPURS boss Juande Ramos hailed his super subs for helping gun down Derby.
Robbie Keane netted after Jamie O'Hara and Dimitar Berbatov were introduced.
And sub Younes Kaboul added a second before Berbatov sealed the win.
Ramos said: "With some big games coming up the idea is to give some players a rest.
"Dimitar can score vital goals and he played his part."
Derby gaffer Paul Jewell said: "I wish we could bring on someone like Berbatov."