Andy Robertson believes Liverpool "would be lost" without Roberto Firmino after the Reds striker continued his excellent form at Burnley on Saturday.

The Brazil international set up Sadio Mane for the Reds' second in the 3-0 win over the Clarets before making the game safe with a clinically taken goal late on.

Despite playing a starring role for Brazil at the Copa America in the summer, Liverpool's No.9 has shown no signs of fatigue so far for Jurgen Klopp's men and was once more instrumental in winning the three points against Sean Dyche's side.

Robertson thinks his colleague is one of the hardest working frontmen in world football and said the Selecao star is invaluable at Anfield.

He said: "With his work-rate, his technique, his goals and his all-round play, I don’t think there’s anyone like him.

"People will say there are better strikers, but for me what he does is so important to our team. We’d be lost without him. He’s world class.

"He does everything, and that’s the beauty of Bobby. He can do it all. He’s our first line of defence, and I’ve not seen anybody better at doing that.

"He presses the defenders and doesn’t give them a minute. He comes back and nicks the ball in midfield for us.

"He’s so important defensively for us, then he goes up the park and scores goals and makes assists. That’s what we need him to do.

"He’s a good trainer, he perhaps doesn’t work as hard as he does in a game, but he saves it for a Saturday.

"The work he puts in during games is probably more than any other striker in the world."

Liverpool's win means they have taken maximum points from their opening quartet of fixtures, setting a new club-record in the process.

Klopp's team have now won 13 successive games in the Premier League, but Robertson insists such a milestone means little for the title-chasing Reds.

"It means nothing because we’ve only got four wins this season," said the Scotland captain.

"Of course it’s nice to be in the record books and if that’s another box we’ve ticked off then great, but it’s not about that

"It’s about four wins from four and top of the league going into the first international break. We had the aim to win the games we needed to win, luckily we’ve done that.

"Now we’ll have the break, come back and we’ve got another tough run."

Robertson also detailed his on-field relationship with Mane, whose measured finish doubled Liverpool's advantage at Turf Moor.

Mane and Robertson have struck up an impressive understanding down the left side for Klopp's European champions and the defender hopes to maintain their dovetailing for some time to come.

"Sadio is a naturally fit boy," said Robertson.

"He didn’t want rest, he wanted to come back and hit the ground running in the Premier League, which he’s done.

"His goal was great, his all-round play got better as the game went on. I’ve got a good relationship with him on the left and hopefully that continues for many games and many years. "He’s a fantastic player and I love playing with him. As long as he keeps doing what he’s doing, he’ll keep producing the numbers.

"The [front three] are world class players, and the goal doesn’t move. They know where the goal is, and they’re finding it at the moment.

"All three of them were fantastic, and hopefully that continues because we need them."