  We use conditions for unitarity cancellations to constrain the couplings of
the top and bottom quarks to Kaluza-Klein modes in Higgsless models of
electroweak symmetry breaking. An example for the mass spectrum of quark
resonances in a theory space model is given and the implications for the
collider phenomenology in the top sector are discussed, comparing to signatures
of Little Higgs and strong electroweak symmetry breaking models.
