Liverpool complete Marko Grujic signing

The 19-year-old, who becomes Jurgen Klopp's first signing as Liverpool manager, will return to the Serbian club on loan until the end of the season.

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"I’m very excited and so proud to be here and a member of Liverpool Football Club. I can’t wait to get started, play at Anfield and train at Melwood," Grujic told the club's official website.

"I was thinking about my progress in my next period and decided it was good for me to come here and try to be the best I can.

"I want to play in front of one of the loudest set of fans in Europe at Anfield.

"I also like the atmospheres at other stadiums, the crowds are very good. I like to play under pressure and that’s why I’ve come here – because it brings out the best in me."

Grujic has helped Red Star soar to the top of the Serbian Superliga, where they boast a commanding 25-point advantage during the winter break. They are undefeated and have only dropped points twice all season.

Jurgen Klopp added: "We’re very pleased because Marko is a big talent and we’ve seen him a lot of times.

"When I came here, our scouts showed me some footage of a very skilled player from Red Star Belgrade. We watched it, we spoke to him, we met each other – he’s a good boy, a young boy but plays an important role at the moment at Red Star, who are the best team in Serbia.

"To describe him, I would say he’s a tall boy, but quick and good at technical things. He can play passes and can dribble. But he is young, so he has to develop. He will do this, so everything is okay."

Grujic was part of the Serbian squad which won the U20 World Cup in New Zealand this summer, starting one of the matches and making a handful of appearances from the bench - including scoring in the penalty shoot-out win over the USA in the quarter-finals.

A right winger also capable of playing through the middle or at full-back, he made his name in Serbian football with a 35-yard wondergoal while on loan at FK Kolubara in 2014.

As his cash-strapped Serbian club sold Aleksandar Kovacevic and Vukan Savicevic this summer, Grujic has become a regular starter, playing 21 matches and scoring five goals in the season so far.