Kevin De Bruyne and Pep Guardiola were caught in animated exchange after the midfielder was substituted in the second half of Manchester City's clash with Liverpool.
The 32-year-old had an uncharacteristically quiet evening at Anfield, with the defending champions coming under intense pressure from Jurgen Klopp's team.
Guardiola opted to shake things up just after the hour and the Belgian appeared to be less than pleased with something that had gone on.