Sunderland manager David Moyes has criticised Patrick van Aanholt after pictures emerged of the full-back seemingly smoking a shisha pipe.
The 26-year-old missed last weekend's 1-0 defeat to Tottenham Hotspur due to a heart scare, and could now be a doubt for this weekend's meeting with Crystal Palace after the pictures emerged in a national newspaper.
Moyes confirmed that the incident took place during the off-season, but also revealed that he has spoken to the player about his actions.
"I don't expect a player to do that, I don't expect a player playing for me to do that. I have had a word with him. I am not impressed," he told reporters.
"But I have got to also say it's a picture that comes out maybe six weeks ago, it was in his off-time, it wasn't during the season.
"But just let me make sure, in no way do I condone it at all. I think it's a bad thing for us to show our younger children and for supporters who follow the players. I don't think it's a good thing, I don't think it's a good thing at all."
Sunderland currently sit 19th in the Premier League table and are one of only two teams still looking for their first win of the season.
Barney Corkhill
