The 22 - year - old is an influential member of Liverpool 's squad .
His return is a boost for manager Juergen Klopp , who is looking to overturn a 1 - 0 deficit when Villarreal visit Anfield for the second leg .
The 22 - year - old is an influential member of Liverpool 's squad and his return is a boost for manager Juergen Klopp , who is looking to overturn a 1 - 0 deficit when Villarreal visit Anfield for the second leg .