Jurgen Klopp saluted Mohamed Salah ahead of a Liverpool milestone, but acknowledged he did not expect the Egyptian and his fellow forwards to be as effective as they have become.
Salah joined the Reds from Roma three years ago in a deal that reportedly cost an initial £34 million (€37m/$43m).
In 105 Premier League matches, Salah – who is generally deployed from the right – has scored 73 goals, including a record-setting 32 in 2017-18.
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The Egypt star has helped turned Liverpool into European and domestic champions, his understanding with Roberto Firmino and Sadio Mane in attack making them a deadly trio that has scored 250 times under Klopp.