And, with his comments, the Spurs coach appears to have hinted that the north London side do not need a new forward.
Pochettino says Tottenham have three capable forwards already - meaning Harry Kane, Roberto Soldado and Emmanuel Adebayor.
“Defoe is a big finisher and a very good striker,” Pochettino told reporters.
“He showed his quality when he was here and he did the same at Toronto but we have three great strikers and we are confident in our players."
Defoe officially signed for Sunderland earlier today and is eligible to face his former side at White Hart Lane on Saturday afternoon. The 32-year-old trained with Tottenham for several weeks before joining the Black Cats.
Away from Defoe, however, Pochettino's comments appear to be very clearcut. Managers often defend their players and deny any knowledge of upcoming sales. Rafa Benitez, for instance, guaranteed that Robbie Keane would remain a Liverpool player live on television several years ago. Naturally, he was gone several days later.
But, if we are to read into the Spurs boss's comments, he is happy with all three of his forwards and, if Tottenham didn't need to sign Defoe, the tone of his comments suggest they don't need to sign any striker.
Is Pochettino being genuine or just keeing his poker face on?