Teenager Jayden Danns called it "the best day of my life" after scoring twice off the bench as Liverpool beat Southampton to set up an FA Cup quarter-final tie with Manchester United.

There was also a dream debut for Danns' fellow 18-year-old Lewis Koumas, who opened the scoring at Anfield when he collected Bobby Clark's pass and found the bottom corner with a shot that deflected off Saints captain Jack Stephens a minute before the break.

After replacing Koumas in the second half, Danns ran on to Harvey Elliott's pass to score with a lovely dinked finish in front of the Kop.

He struck again two minutes from time, thumping the ball home after Southampton goalkeeper Joe Lumley had parried Conor Bradley's shot into his path.

"I couldn't be happier today. Today is the best day of my life," Danns told BBC Sport.

"I've watched Liverpool since I was a young boy and to score at the Kop End is more than a dream. I couldn't be happier."

With injuries to a host of first-team players, Jurgen Klopp named six players aged 21 or younger in his starting XI and, just as in Sunday's Carabao Cup final, the youngsters did not let him down.

Southampton had a host of chances in the first half, but having failed to make them count they were punished by Koumas late in the half.

The visitors had further opportunities to level in the second period but remained profligate in front of goal.

Again they were made to pay, this time by Danns, who was making just his third Liverpool appearance after debuting against Luton last week.

"In the Carabao Cup final I had a couple of opportunities to score, so I came into today thinking 'bury the next one'," Danns added.

"I couldn't describe it [what it feels like to celebrate in front of the Kop]. It is a dream come true. The first thing I thought was to slide on my knees. It was an unbelievable experience."

While Liverpool remain in contention for a quadruple, and can look forward to a mouth-watering meeting at Old Trafford in the last eight, Russell Martin's Saints can now give their full attention to trying to earn promotion back to the Premier League.