Rozehnal, one of former boss Sam Allardyce's first signings when he arrived from Paris St Germain for £2.9million last summer, has gone to Lazio on loan and will sign a permanent deal at the end of the season.
He rapped: "I am bitter. I was looking forward to coming to Newcastle after playing at Club Brugge and PSG.
"Now I am not sure if this looks like a dream spell. I did not expect I would be sitting on the bench.
"Once I played as right-back, then left-back, then in right midfield or as a defensive midfielder.
"I don't like such rotation but I will fight on."