Lazio president Claudio Lotito confronted some players at their training retreat yesterday.
Lazio are in ritiro this week after their poor defeat to Hellas Verona.
Lazionews.eu says president Lotito was present at the training ground and had lunch with the team after the morning session.
Lazio's director of sport Igli Tare and coach Maurizio Sarri were already present.
It's reported there was a 'heated confrontation' between Lotito and some players, in which he ordered them to step up their performances.
Lazio have suddenly hit a form slump after a bright start to the season under Sarri.