The first player bought by Jurgen Klopp for Liverpool finds himself back on the sidelines at the club he joined after leaving the Reds.
Marko Grujic was signed for a fee of £5million in January 2016, the first signing Liverpool made after Klopp took over from Brendan Rodgers. His time at the Reds was a bitter disappointment though, with the Serbian making just 16 appearances in four years.
After loans at Cardiff City and Hertha Berlin, he was sold to Porto for £10.5m in last summer's transfer window. His first permanent campaign in Portugal went well, with Grujic making 36 appearances in all competitions as Porto won the Primiera Liga.
