News of the deal being agreed came via the Reds' official Twitter account on Thursday, with the Scotland international signing until 2024 at Anfield:
"As soon as the club came to me, it was a no-brainer for me—I want to stay here, so as soon as they put an offer on the table it was signed as quickly as that," he told the club's website. "It was a pretty easy contract for me and I'm sure for the club as well. We both agreed very quickly, that's why it's been done so quickly."
Robertson arrived at Liverpool in the summer of 2017 and while it took him a while to get into the first team on a regular basis, he's now rated by many as the best left-back in the Premier League.
Squawka tracked the incredible rise Robertson has enjoyed in recent seasons:
Squawka News @SquawkaNews
July 2012: Robertson is playing in the Scottish third tier. July 2017: Robertson joins Liverpool from Hull for £8m. May 2018: Robertson plays in the Champions League final. September 2018: Robertson named Scotland captain. January 2019: Robertson signs new Liverpool contract. https://t.co/vgEBmOfp97
At the start of the 2017-18 campaign Liverpool manager Jurgen Klopp rotated between Robertson and Alberto Moreno. Quickly the former started to show his class and by the end of the season he had cemented his place on the left side of the defence.
Robertson was a key part of the Reds side that made it to the UEFA Champions League final that season and he has taken his game on again in 2018-19. He's part of a defence that's conceded just 10 times in the Premier League this season and a team that's four points clear at the top of the table.
With that in mind it's not a surprise to see Liverpool have moved to secure the player's long-term future.
Journalist Leanne Prescott commented on how an area of the field that's been a long-term issue for Liverpool is now resolved because of the Scotland skipper:
It's not just defensively where Robertson excels though, as he's developed into a key attacking outlet for the Reds.
His trademark surges up the flank have become crucial for Klopp's side and so often at the end of those bursts Robertson has the composure and quality to find a red shirt. So far this season he has four assists in the Premier League.
Klopp is clearly pleased to see the 24 year old extend his deal at Anfield too:
James Carroll @James_Carroll84
Jürgen Klopp: “I think of all the contract renewals I have been involved with, this one was done in almost record time. He might be from Glasgow originally, but everything about him screams Liverpool.” The boss on Andy Robertson’s new contract in full: https://t.co/aOZuAE84nb https://t.co/0qLO1J3XxN
Robertson is the type of player every coach would love in their squad. Earlier in the season former Manchester United manager Jose Mourinho said "I am still tired looking at Andrew Robertson" after the Red Devils were beaten 3-1 by Liverpool.
However, the player clearly content with life on Merseyside and adored by those who frequent Anfield every other week. If Liverpool are to push on and win major honours in either this season or coming years, Robertson will be a big part of it.