Sagna said: "It's a big circus at the club, you don't really know who's leaving and who is making the decisions.
"It seems like the players lack confidence. You can't blame them because they don't know who is going to the the next manager.
"It's a tricky situation for the club."
He added: "First of all they need to find a good manager and stability in the club.
"Because in past years they always have players leaving at the end of seasons and it's been a long time since they kept the same group of players.
"You still have great players in Mesut Ozil and [Nicolas] Pepe and even the defence.
"I think it's more like a lack of confidence why the defenders aren't performing."
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