With the start of LHC there will be two hadron colliders to measure
the Standard Model in the high energy regime. Given the planned
experimental precision, detailed theoretical predictions are
mandatory. Thus, in addition to QCD corrections, weak corrections must
be taken into account. Although suppressed by a smaller coupling,
these corrections can become large in differential distributions due
to so-called Sudakov logarithms. In this talk the weak corrections
to top pair and bottom pair production will be presented and
discussed.