  We investigate tree-level five-point amplitudes in scalar-QCD expressed in
terms of Sudakov variables and find the equivalent "gravitational" counterparts
using the color-kinematics duality proposed by Bern, Carrasco, and Johannson.
Taking the multi-Regge limit in the gravitational amplitudes, we show that
those pieces in the coupling of two reggeized gravitons to one on-shell
graviton directly stemming from the double copy of the vertex for two reggeized
gluons to one on-shell gluon are universal and properly reproduced by the
duality.
