Celtic defender Christopher Jullien is closing in on a move to the Bundesliga.

The central defender is set to sign for German giants Schalke this summer.

Jullien, who is rated at £7 million, was out of favour with Celtic boss Ange Postecoglou by the end of last season.

The 29-year-old has agreed terms with Schalke, and is undergoing his medical tests this week.

While Jullien did report to pre-season training with Celtic, he quickly posted a photo on social media showing himself in a plane.

That alerted the club's supporters to his departure, which is now all but confirmed by the Daily Mail.