Bayern Munich star Franck Ribery was reportedly involved in a fracas with a member of the public at the club's training session on Wednesday.
The man in question is believed to have approached Bayern's training facilities, claiming to be a friend of Ribery, before becoming embroiled in a heated confrontation with the France international when asked why he was there.
Police have confirmed they were called to an incident involving an intruder at the training base, but said the issue was resolved on site.
"We had to attend an incident at Sabener Strasser," police spokeswoman Alexandrea Schmeitz told TZ.
"Because of a suspect who was located there. We went there, and sorted everything out."
Prior to the training session, Ribery had instructed security that his brother and cousin would be visiting him, which resulted in the fan being mistakenly allowed to enter the compound after he claimed in French that he knew the 29-year-old.