Liverpool manager Jurgen Klopp has defended goalkeeper John Achterberg.

Some sections of Reds fans have criticised Achterberg in the past following poor performances from Simon Mignolet and Loris Karius.

But Klopp has dismissed the negativity and praised Achterberg's work ethic.

"First of all, John is a goalkeeper maniac. He's working constantly," Klopp told the Liverpool Echo.

"It's so easy. All the people in the pubs think they know and understand football 100%.

"But if you asked them: 'What does a goalkeeper do?' They couldn't say more than 'catch balls'. They have no clue about goalkeeper techniques and all that stuff.

"John is the first in the building and the last to leave. No matter how early I get into Melwood, I get up the stairs and he's already there - sat there with the laptop open watching goalkeepers from the other end of the world.

"He's constantly in there developing, changing training programmes, working with the boys. For me, he's a fantastic goalkeeper coach.

"There's not any reason for criticism. He's also a fantastic lad."