Best And Worst Value Signings Of Summer Transfer Window Revealed

Chelsea goalkeeper Kepa Arrizabalaga has been named as the most overpaid signing of the summer transfer window.

Leading stats and research company CIES Football Observatory have given the Spaniard the unwanted title, believing that Chelsea paid £40 million over the odds for the 23-year-old.

Kepa transferred from Athletic Bilbao to Chelsea for £71.6m, a world record figure for a goalkeeper, but according to the research the player's true valuation should have been £31.5m.

The stats also found that Yerry Mina's transfer to Everton was overpriced by £15.6m, and Danny Ings transfer fee to Southampton was also inflated by £13.4m.

Most overpaid signings

Kepa Arrizabalaga - Atletico Madrid to Chelsea

Actual fee £71.6m Fair price £31.5m Overpaid £40.1m

Thilo Kehrer - Schalke to PSG

Actual fee: £33m Fair price: £15.2m Overpaid: £17.8m

Joao Cancelo - Valencia to Juventus

Actual fee: £36m Fair price: £20.2m Overpaid:£15.8m

Yerry Mina - Barcelona to Everton

Actual fee:£27.2m Fair price:£11.6m Overpaid:£15.6m

Javier Pastore - PSG to Roma

Actual fee:£22m Fair price:£6.8m Overpaid:£15.2m

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Danny Ings - Liverpool to Southampton

Actual fee:£20m Fair price:£6.6m Overpaid:£13.4m

Radja Nainggolan, Lucas Torreira, Thibaut Courtois and Joao Moutinho are other signings that proved value for money at their new clubs.When it came to the best value deals for players, Bryan Cristante topped the charts, with Roma underpaying for the Atalanta midfielder by £31.6m. Liverpool can also count themselves lucky with their signing of Brazilian Fabinho, the Reds signed the Monaco midfielder for £43.7m, underpaying by £22m.