  Recent article "Revisiting the 2PN Pericenter Precession in View of Possible
Future Measurements" published by Iorio (Universe, 2020) argues that
calculations of the secular 2PN precession of the orbital pericenter of a
binary system accomplished by Damour and Schaefer (Nuovo Cim. B, 1988) and by
Kopeikin and Potapov (Astron. Rep., 1994) with different mathematical
techniques are inconsistent, differ from each other and do not agree with the
result obtained by Iorio (Universe, 2020). The purpose of this communication is
to demonstrate that the article by Iorio is erroneous, suffers from
misconceptions and cannot be trusted.
