Midfielder who joined Liverpool in 2014 after a season with Bayer Leverkusen. He started playing for Germany's national team in 2015.
He debuted professionally with Bayern Munich's B squad in 2011, then made 4 appearances with the club's senior squad in 2012-13.
He scored 3 goals in 22 appearances for the German U17 team from 2010 to 2011.
He was born in Frankfurt, Germany.
He joined midfielder Steven Gerrard on Liverpool in 2014.