*raises hand* David Tennant is right, his name is "The Doctor", but it's not wrong to call him "Doctor Who". Doctors One through Nine are called "DOCTOR WHO" in the credits! In fact, other former Doctors refer to him as "Doctor Who".
David Tennant tells a Knock Knock joke. David Tennant tells a Knock Knock joke when hosting a Dr. Who themed "Never Mind the Buzzcocks" episode. Cathe dr who David Tennant buzzcocks knock knock Never Mind the B Wilfred Mott