Former refs chief Keith Hackett says Liverpool goalkeeper Alisson needs to study football's rules book.

Alisson, along with his manager Jurgen Klopp, felt his own goal in Liverpool's 3-2 defeat at West Ham United should have been ruled out for a foul.

But Hackett told Football Insider: “I'm not a goalkeeping expert but I think the first thing is, if you come off your line to make a save you've got to ensure you can get the ball.

“Therefore, I think, ultimately the space on a football field is shared between 22 players.

“There's nothing preventing a forward from standing in front of the goalkeeper. He's got to find a way around it.

“There's no offence here. He needs to understand there was no offence, he needs to understand, just like a referee who's made an error, he's made an error.

“He's not going to suddenly get players moving out of the way so he can collect the ball.

“He's shown a weakness and this is now where referees have got to focus a bit more. There might be those that do cross the line."