"Until yesterday I wasn't sure whether I was going to leave or not," he said.
"My agent told me the deal was very advanced and I was then told that the deal had been reached between both clubs.
"For me this is a beautiful challenge and I hope everything goes well. It's a huge leap for me."
Meanwhile 18-year old midfielder Duran is delighted to be joining from Malaga."It's a unique opportunity and I couldn't let it go by," he said. "I have spoken with Rafa Benitez, and I believe that this is the best option for me.
"To play for Liverpool is a dream for me and now I only desire to fight to play finally for the club."