In this paper, we connect rectangular free probability theory and spherical integrals. We prove the analogue, for rectangular or square non-Hermitian matrices, of a result that Guionnet and Mäıda proved for Hermitian matrices in [12]. More specifically, we study the limit, as n,m tend to infinity, of 1 n logE{exp[nmθXn]}, where θ ∈ R, Xn is the real part of an entry of UnMnVm, Mn is a certain n...