After watching Liverpool add another sweeping brush stroke to their masterpiece of a season, even manager Jurgen Klopp had to concede that he had never seen anything like the relentless, consistent excellence of his record breakers.

The 4-0 win over a Southampton side who had made life hard for Liverpool, until being swamped in the second half saw Klopp's European champions pass yet more milestones in what increasingly promises to be one of English football's landmark campaigns.

After agreeing that Liverpool's 22-point lead in the Premier League -- the biggest at the end of a day in the history of England's top-flight -- was "astonishing," Klopp was also asked by reporters if he had seen such consistency from any team.

"I have never seen it, to be honest," he said. "If I was asking from the outside, I would ask the same questions.

"It's not that I feel stronger and stronger and stronger after each win, it's not like this. It is just one great celebration, then it's relief, settle and go again.

"We are not perfect, not even close to being perfect; we just try to make the best of our skills in the best possible way.

"The boys have done that now for a while pretty good and that's why we have these kind of numbers -- but it doesn't feel a second like it's really special. It just feels the hardest work."