As the world prepares to say goodbye to the 2010s, Andy Robertson will look back and reminisce on what has been a quite remarkable decade.The 25-year-old is now widely regarded as the best left-back in world football - and rightly so.Robertson has improved season-on-season since joining Liverpool for the bargain price of £8 million in 2017 and is now worth a massive £72 million, according to Transfermarkt.In truth, even £72 million wouldn’t be enough to convince the Reds to sell Robertson, who is now one of the Premier League’s best players.For Jurgen Klopp, the Scotland international is priceless.

Back at the start of the 2010s, Robertson was a youth player at Queens Park, having been released by Celtic at Under-15 level in 2009 because he was considered to be too small.

What a mistake that was by Celtic, in hindsight.

He made his senior debut for Queens Park in the Scottish Third Division during the 2012/13 campaign and was playing in front of crowds of a few hundred people at the time.

Nobody who watched Queens Park that season could have guessed they were looking at a future world-beater.

But his performances did catch the eye of Scottish Premiership side Dundee United, who brought the 19-year-old to Tannadice in June 2013.

Just a year earlier, Robertson was like a lot of other teenagers: complaining about having no money on social media.

“Life at this age is rubbish with no money,” Robertson famously tweeted in August 2012. “#Needajob”.

Little did he know that untold riches were just around the corner.

After playing 44 games for Dundee United, scoring five goals in the process, Hull City landed the talented full-back for just £2.85 million in July 2014. What a bargain.

He was unveiled by Hull alongside current Manchester United star Harry Maguire, who cost just £2.5 million at the time.

Robertson made 24 Premier League appearances that season but was unable to prevent Hull from being relegated back to the Championship.

He then played 42 games in the Championship the following season and helped the Tigers win promotion back to the top-flight at the first time of asking in May 2016, beating Sheffield Wednesday in the play-off final.

Another tough season in the Premier League followed and Hull were relegated again at the end of the 2016/17 campaign - but Klopp had seen enough to convince him that Robertson had what it took to play for Liverpool.

Robertson joined the Reds in an initial £8 million deal, which saw Kevin Stewart move in the opposite direction.

"It feels a bit surreal,” Robertson told reporters at the time. “There are not more special clubs than Liverpool."

Klopp, meanwhile, commented: "For Andrew, this is another big step on what has been a quite incredible personal journey in a very short space of time.

"I know our environment will benefit him and help him push himself even more than he has already. This is a player who does not limit his ambition."

Klopp hit the nail on the head.

Robertson, whose partner gave birth to their son Rocco in August 2017, made 30 appearances for the Reds during his debut season with the Merseyside outfit and was then appointed Scotland captain in 2018.

The popular Scot has since gone on to make over 100 appearances for Liverpool, winning three major honours in 2019: the Champions League, the Super Cup and the FIFA Club World Cup.

Earlier in the year, he became a dad for the second time when his daughter, Aria, was born.

Not in Robertson’s wildest dreams could he have imagined all this was possible 10 years ago.