Ange Postecoglou has confirmed that Tottenham have suspended Yves Bissouma for the Premier League opener against Leicester City on Monday after the midfielder shared a video on social media of himself inhaling laughing gas.

The Mali international issued an apology after the Snapchat clips showed him using nitrous oxide, a class C drug.

Tottenham released a statement indicating that the situation would be handled internally. During a press conference on Thursday, Postecoglou noted that Bissouma had failed in his duties as a role model and emphasized that the player must regain the trust of his teammates as he misses the first match of the season.

"I've been in the game a long time and every time situations like this arise, and they do happen, I've always tried to look at them in a couple of different ways," Postecoglou said.

"One is there's a person involved, in this case it's Biss [Bissouma], and he's made a really poor decision. You want to understand that and want to try to help him through that and as a club what we can do to make sure he doesn't make those kind of choices and decisions in the future.

"With that context, there's still sanctions involved and some of those sanctions are education and giving him a clear understanding of how wrong it was. You always want to give people an opportunity to learn from their mistakes."The second part of that is he is a footballer for this club.

He has responsibilities. He has responsibilities to the club, he has responsibilities to his teammates, he has responsibilities to supporters and everyone associated with the club and he's failed in those duties. There's got to be sanctions for that.

"He won't be available for Monday. We've suspended him from Monday's game. Beyond that, there's some trust building that has to happen between Biss and me, and Biss and the group.

"That's what he needs to work hard at from now on, to win that back. That's got nothing to do with one game. He may be suspended for one game but he has to earn that.

"The door is open for him and hopefully we can help him to realise that the decisions he makes impact more than just him and allow him to make better decisions moving forward."

Nitrous oxide was classified as a class C drug under the UK government's Misuse of Drugs Act last November, making possession of the substance, unless used for pain relief, a criminal offence that could result in up to two years in prison. It remains unclear if Bissouma will face any criminal charges.

When asked how Bissouma could regain trust, Postecoglou responded, "It’s about behavior, mate. It’s really that simple. He needs to make better choices going forward. He’s clearly disappointed and has been very apologetic, not just to me, but to the club and everyone involved."

"But that's just the first part of the process, the next part is behaviour now. Making sure that he does the things he needs to do, like for all of us. We all make mistakes. It is how you find your way back from those mistakes and what you do is far more important than what you say."

Postecoglou expects £65 million ($83.2m) signing Dominic Solanke to be available against Leicester, while Richarlison has recovered from a calf problem but needs "match minutes over the next few weeks."