Marko Grujic became Jürgen Klopp's first signing as Liverpool manager after sealing a move from Red Star Belgrade on January 6, 2016.
The 19-year-old immediately returned to his boyhood Red Star on loan for the remainder of the 2015-16 campaign.
He made quite the impression during his first pre-season with the Reds, scoring a brilliant header in a 4-0 friendly win over Barcelona at Wembley in August 2016.
The midfielder made his competitive Liverpool debut in the same month when he came on as a second-half substitute away at Burnley.
His first start for the club would arrive in that September as he played the entirety of a 3-0 win over Derby County in the third round of the League Cup.
Injury limited Grujic to just eight appearances during his first season on Merseyside as Liverpool secured a top-four finish in the Premier League.
In January 2018, he joined Championship side Cardiff City on loan until the end of the season and played a big role in helping Neil Warnock's side achieve promotion to the top flight.
He signed a new long-term contract with Liverpool in August 2018 before joining Hertha BSC on a season-long loan deal.
The Serbia international was highly regarded during his time in the Bundesliga, netting five goals in 23 appearances.