The 30-year-old centre-back will cost the Reds around 3 million euros.
“Never in my life have I hidden from the consequences of my choices,” a statement from the 30-year-old said.
“I said last week that I would be an AEK Athens player for the next four years and I meant what I said at the time.
“Today, however, I had to make the most important decision in my career. Going back on my word was difficult, but this is life, and life can bring about strange things.”
