Eurosport - German player Samed Yesil celebrates his goal against England during their FIFA U-17 World Cup quarterfinal football match in Morelia, Mexico on July 4, 2011 (AFP)
The 18-year-old, who has scored 22 goals in 26 games at youth level for Germany, passed a medical on Thursday.
"The first thing is that I have to train and then in one or two years I hope, step by step, to be in the first team," Yesil told the club's official website.
"It is my dream to play for Liverpool and I will give my all."
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