The former Reds striker has watched on with delight and awe as his boyhood team have established a 22-point advantage at the top of the Premier League this season by dropping points only once in 25 matches.
Jürgen Klopp’s side are unbeaten in 42 games in the division in total, stretching back to January 2019, having also become European champions last June.
“It’s unbelievable what’s happening,” Lambert, who was at Anfield for the 2014-15 season, told Liverpoolfc.com.
“I can’t believe the levels they’re getting to, I’ve never seen it before. To see the Reds doing it this year has been unbelievable.