Jack Grealish was reportedly involved in a late-night (early morning) partying at a Birmingham hotel in the hours after Saturday’s 0-0 draw against Ipswich Town.
Di Matteo, whose side have won just one of their eight Championship matches this season, confirmed the ongoing investigation at his press conference on Thursday.
On Wednesday Villa chairman Tony Xia tweeted Grealish, urging him to “focus every minute on and off the pitch” and to “choose the right type of people to be with”.
Roberto Di Matteo confirms an internal investigation is ongoing regarding Jack Grealish. #AVFCpic.twitter.com/1TcZmJKKQx
— Aston Villa FC (@AVFCOfficial) September 22, 2016