The Belarus midfielder is fed-up with the way he has been treated by Gross this term.
"My contract says I can only play 60 minutes a game," Hleb said sarcastically, "but the team plays much better without me and so Gross did the right thing.
"I do not know what he expects from me, but I have a problem with him. We talked, but nothing was achieved. My chances of staying here? 0%."