The obvious link, often suggested in the press, is that of a move to Milan to link up with his former running mate at Dynamo Kiev, Andriy Shevchenko.
"I'm not concerned with what his agent does or doesn't say," said Glenn. "It's my communication with the player that counts.
"I've spoken with player and I understand his frustration and his unhappiness with not starting, but that goes for a lot of players at the club.
"He's never said anything to me about wanting to move and, until he does, I won't lose any sleep. Simple as that.
"This isn't about three months, my contract is about building something over the next five years, and I see Sergei playing a big part in that.
"He's an excellent player and at this moment in time, in this phase of the season, he's finding himself not playing in the team. But he's got a lot to contribute, he came on and might have scored two goals on Sunday so it's not a case of the starting team at the moment and that's it.
"In this phase, the way we're playing, you've got to say, there is a team that picks itself at this moment in time. That might change. In the long term situation I think Sergei has got a bright future with us.
"What I must make clear, he has never said anything to me about moving. I read quite a lot about him wanting to move - but it's not been from him."
Glenn has scotched rumours doing the rounds that Sergei Rebrov is unsettled at the club and seeking a move.