Every single year, Premier League clubs spend millions of pounds in order to try and improve their squads.
Liverpool did that once again last summer.
The Reds reached the Champions League final and finished in the Premier League top four, but Jurgen Klopp felt the need to splash the cash to improve his squad.
They spent £164 million on four players as they tried to improve on the successes of last season.
Alisson Becker, Fabinho, Naby Keita and Xherdan Shaqiri all arrived as Klopp bolstered his squad significantly.
- Premier League's worst value signing XI
- Lescott: no Liverpool players would get in Man City's team
- Liverpool journalist rates players' seasons out of 10
And, the amount of money they have spent has paid off.
Liverpool have been seriously impressive in the Premier League. They currently occupy first place, having won 23 and lost just once from their opening 31 games.
They are two points clear of Manchester City, although Pep Guardiola's side have a game in hand.
Liverpool are also in contention to progress to their second successive Champions League final.
But which one of their signings has proven to be the best value of money, and which one is the worst?
TheSportsman have used data to answer which signings have under and over-performed.
They have used a different criteria for each position and then divided the total by their transfer fee.
For example, forwards have been judged by a number of statistics, including the minutes they’ve played, their goals, assists and number of chances they've created.
And, after the data has been crunched, they've named Shaqiri as the signing who has been Liverpool's best value for money, while Naby Keita has been their worst.
Best - Xherdan Shaqiri (£7,585 per minute, win, goal, assist, shot on target, pass, cross, big chance created)
Worst - Naby Keita (£27,008 per minute, win, goal, assist, shot on target, pass, tackle, shot blocked, clearance, interception, cross and big chance created)
Shaqiri has been labelled as a 'bargain' following his £12million move from Stoke.
It seems Liverpool got value for money there.
But Naby Keita has struggled and the data proves that fact.
Who do you think is Liverpool's best and worst value signings for the 2018/19 season? Have your say by leaving a comment below.