Wayne Rooney is due to appear in court later this month after being charged with a drink-driving offence.
Rooney was reportedly pulled over by police last week as he was driving a person home, prompting a number of newspapers to subsequently make allegations about the player’s private life.
Speaking at a press conference, Koeman told reporters: “I’m very disappointed by the situation. We have spoken last Tuesday. Any disciplinary matter will be dealt with by the club at the appropriate time. He will play this Saturday.”