Jurgen Klopp’s biggest strength over the previous few years at Liverpool has been his diligence in the transfer market, shipping out unwanted deadwood and bringing in stronger and younger replacements.

Signing Alisson to replace Loris Karius is a prime example of a strategy that has paid off so well in recent years, with the Anfield side winning Premier League and Champions League titles amongst other honours.

It was a signing that the German made in 2017 that might just be one of his finest, especially in terms of value for money over the duration of his contract…

Robertson is one of Klopp’s finest signings

The Scotsman arrived at Anfield for a £10m transfer fee from Hull City after a three-year spell. With the left back plying his trade for amateur side Queen's Park in the Scottish fourth tier just five years before, it was a remarkable rise through the game, and this was only the beginning.

His first season on Merseyside saw him earn a Champions League runners-up medal and this would give him all the motivation required for the success ahead.

Robertson has since played 183 matches for Liverpool, missing just 13 Premier League games in that time as he has established himself as one of the greatest left-backs on the continent.

The 28-year-old has won all domestic honours south of the border, completing his collection with FA and League Cup winners medals last season, while adding Champions League, UEFA Super Cup and Club World Cup titles just for good measure.

His influence in Klopp’s side has been key to their success, with teammate Trent Alexander-Arnold lavishing praise on the player last season by calling him “outstanding” and considering his growth since joining in 2017, this statement is certainly justified.

A fee of just £10m seems like an incredible bargain, especially when the CIES Football Observatory now values him at €50m (£43.5m), meaning he is worth a staggering 335% more now than when Liverpool signed him.

While he is arguably at the peak of his powers, Klopp is unlikely to sell him. If he did, however, there is no doubt the fee would rise north of £50m, ensuring the Reds made a lavish profit.