Karius was on loan to Besiktas and Union Berlin before returning to be part of Liverpool's goalkeeping group at its training centre this season. He joined the team in 2016 from German club Mainz.
Brazil goalkeeper Alisson played down speculation over his club future on Tuesday as he lives a boyhood dream at the World Cup in Russia.
Devastated Jurgen Klopp admitted he was shell-shocked by Loris Karius's costly mistakes in Liverpool's 3-1 Champions League final defeat against Real Madrid on Saturday.
Salah was again instrumental for Jurgen Klopp's side as he took his tally to 17 Premier League goals this season with two fine finishes.