  We discuss single-diffractive production of dijets. The cross section is
calculated for the first time in the $k_t$-factorization approach, neglecting
transverse momentum of the pomeron. We use Kimber-Martin-Ryskin unintegrated
parton (gluon, quark, antiquark) distributions (UPDF) both in the proton as
well as in the pomeron or subleading reggeon. The UPDFs are calculated based on
conventional MMHT2014nlo PDFs in the proton and H1 collaboration diffractive
PDFs used previously in the analysis of diffractive structure function and
dijets at HERA. We try to describe the existing data from Tevatron and make
detailed predictions for possible LHC measurements.
