The 20 most overpriced players this summer: featuring Chelsea, Liverpool, Manchester United and City signings

Every football fan will know that clubs across the world far outpay a player’s valuation to secure him on a long-term – or sometimes even short-term – deal, with prices continuing to inflate.

The CIES Football Observatory have calculated the estimated value of a player and compared it to transfer fee that he was sold at this summer.

They say, taking data from 2009-2014, that prices have inflated by 23%.

Their findings take on board the players age, his playing position, how long is left on his contract, his international status, his experience, and the standard at which he is competing at to reach their figure.

And the study has suggested that the Premier League have been perhaps the most naive – or desperate – in the summer transfer window, with no other top flight overpaying for talent more so than England’s top flight over the past few months.

Here are the top 20:

20. Yohan Cabaye – PSG to Crystal Palace

Reported fee: £10m 

Estimated Value: £5.5m

19. Geoffrey Kondogbia – AS Monaco to Inter Milan

Reported fee: £22m 

Estimated value: £17m

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18. Robert Brady – Hull City to Norwich City

Reported fee: £7m 

Estimated value: £2.4m

17. Roberto Soldado – Tottenham Hotspur to Villarreal

Reported fee: £9m 

Estimated value: £4m

16. Jordan Amavi – Nice to Aston Villa

Reported fee: £9.4m 

Estimated value: £4.3m

15. Julian Draxler – Schalke to Vfl Wolfsburg

Reported fee: £21.8m 

Estimated value: £16m

14. Paulo Dybala – Palermo to Juventus

Reported fee: £23.2m 

Estimated value: £17m

13. James Chester – Hull City to West Brom

Reported fee: £8.2m 

Estimated value: £1.9m

12. Adama Traore – Lille to AS Monaco

Reported fee: £10.2m 

Estimated value: £3.2m

11. Morgan Schneiderlin – Southampton to Manchester United

Reported fee: £24.7m 

Estimated value: £17.3m

10. Ivan Perisic – Vfl Wolfsburg to Inter Milan

Reported fee: £13m 

Estimated value: £5.2m

9. Petr Cech – Chelsea to Arsenal

Reported fee: £10.9m 

Estimated value: £2.6m

8. Aymen Abdennour – AS Monaco to Valencia

Reported fee: £18.1m 

Estimated value: £9.4m

7. Alessio Romagnoli – AS Roma to AC Milan

Reported fee: £18.1m 

Estimated value: £9.2m

6. Nicolas Otamendi – Valencia to Manchester City

Reported fee: £29m 

Estimated value: £19m

5. Arda Turan – Atletico Madrid to Barcelona

Reported fee: £24.7m 

Estimated value: £13.6m

4. Angel Di Maria – Manchester United to PSG

Reported fee: £45.7m 

Estimated value: £34.6m

3. Christian Benteke – Aston Villa to Liverpool

Reported fee: £33.4m 

Estimated value: £19.1m

2. Kevin De Bruyne – Vfl Wolfsburg to Manchester City

Reported fee: £53.7m 

Estimated value: £34.4m

1. Anthony Martial – AS Monaco to Manchester United

Reported fee: £36.3m 

Estimated value: £16m