McGregor is in Italy for the christening of his son Rian, which took place at the Vatican on Saturday.
The 33-year-old Irish star has been seen visiting the sights and being mobbed by fans on the streets, also paying a trip to see legendary football manager Jose Mourinho, who is now in charge at Roma.
View this post on Instagram
A post shared by Conor McGregor Official (@thenotoriousmma)
View this post on Instagram
A post shared by Jose Mourinho (@josemourinho)
However, a night out with Italian music star Facchinetti and his wife Wilma Helena Faissol allegedly ended in an altercation as McGregor was accused of leaving the DJ with a cut to his mouth and a broken nose.
According to reports, the group had been “having fun” earlier in the evening before McGregor invited the couple to go along to another party.
Facchinetti then claims he was the victim of an unprovoked attack from McGregor as the Irishman supposedly punched him in front of almost a dozen witnesses.