Aston Villa boss Roberto Di Matteo has told Jack Grealish to "grow up" with the midfielder under investigation.
Grealish is under a club investigation after reports police were called to a Birmingham hotel on Sunday morning, where the 21-year-old was alleged to be partying.
A newspaper report claimed fellow party-goers were inhaling nitrous oxide. There is no suggestion Grealish joined them in doing so.
Villa have not finished their probe and Grealish has not been fined or disciplined yet, although both options remain open to the club.
Roberto Di Matteo confirms an internal investigation is ongoing regarding Jack Grealish.