Pep Guardiola has warned Benjamin Mendy to curb his late-night antics after the Manchester City defender was spotted in a club in the early hours of Saturday morning.
France star Mendy was reported to have been at the Manchester nightspot until 0230 GMT, according to British media on Tuesday.
Mendy had not been included in City's squad for their Premier League win at Fulham later on Saturday.
Instead, he was due to attend a training session as he battles to return to fitness following another injury-plagued season.
City boss Guardiola admitted he couldn't force Mendy to stay at home, but he made it clear he was frustrated by the player's latest high-spirited incident.
"They are old enough to know what they have to do, I'm not his father. I would prefer him to go home earlier but I don't control the players in that situation," Guardiola told reporters on Tuesday.