Guler was again left on the bench in victory over Barcelona.
Asked about the youngster, Ancelotti said: "He's in good shape, he's been available for some time now but he's not had the chance because we've had so many demanding games.
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"Changing the team when we're playing well is difficult.
"He hasn't had the minutes he deserves, but given his good attitude, the way he's working and his commitment, he could play at any given moment."