Former Liverpool forward John Aldridge says the arrival of Joel Matip at the club has made the Premier League side a better defensive unit.
Despite not picking up a clean sheet this season, the Reds have impressed thus far under manager Jurgen Klopp's ultra high-pressing style of football.
Their attacking vigor with the ball and particularly on the counter attack has drawn plaudits from the English media, but Aldridge has been impressed by their summer defensive acquisition – who signed on a free transfer from Bundesliga side Schalke.
"I realised against Chelsea is just how I feel a lot more confident defending set plays because of him in the back four," Aldridge told the Liverpool Echo.
"Matip's size and height means he's winning those high balls in the box, he's a real man mountain. He reminds me of Sami Hyypia in that respect, in how he likes to get his head on everything.
"We've looked susceptible from set pieces in recent times, now we look solid," the former Republic of Ireland international added.
"Don't forget this lad came on a free as well. Ridiculous. We always moan about paying big fees for ordinary players but Jurgen Klopp has plucked this one out of nowhere. He could be a revelation.
"He has every attribute – he's great in the air, dominant, fantastic on the floor. Make no mistake, Klopp has found one here."