  Electroweak radiative corrections can be evaluated in the Sudakov
approximation, a systematic high energy expansion known to be relevant for the
analysis of future collider experiments in the TeV energy range. In the Minimal
Supersymmetric Standard Model and at next-to-leading order, Sudakov electroweak
corrections satisfy remarkable relations at the one loop level. Explicit
computations in component fields are available for various different $2\to 2$
processes relevant for Linear Collider or LHC physics. The Sudakov corrections
turn out to be equal or closely related in several classes of processes
differing by the replacement of certain final or initial states with their
superpartners. This fact suggests that supersymmetry is partially restored at
high-energy. We analyze the supersymmetric structure of such relations by
computing the Sudakov corrections in the framework of superfield perturbation
theory. As a simple application, we derive in full details an extended complete
set of supersymmetric relations among different processes related by
supersymmetry to the fundamental fermion pair production process $e^+e^-\to
f\bar f$.
