  We present the double real radiation corrections to the hadronic $t \bar{t}$
production stemming from partonic processes with fermions only. For this
purpose, we extend the NNLO antenna subtraction formalism developed originally
for the computation of jet observables in $e^+e^-$ annihilation to include the
evaluation of hadronic observables involving a massive pair of particles. In
all partonic processes, we checked the validity of our subtraction terms given
for leading and subleading colour contributions numerically by showing that the
ratio between real radiation matrix elements and subtraction terms approaches
unity in all single and double unresolved configurations.
