Richarlison is valued at double the price Everton paid Watford for his services in the summer of 2018 according to football analytics centre CIES Football Observatory.
CIES published a list of players with the greatest estimated transfer values across Europe's top-five leagues with goalkeeper Jordan Pickford making the cut alongside his team-mate.
Richarlison joined Everton for an initial £35m in a deal that could eventually be worth £40m.
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The Football Observatory now believe he is valued at almost £90m following an impressive first full season at Goodison Park.
The estimation makes him the 10th most expensive player currently operating in the Premier League and the 16th across the top-five leagues.
Pickford, meanwhile, is the third-most expensive goalkeeper on the entire list at £62m which would double his own price-tag since arriving from Sunderland in 2017.
Paris Saint Germain superstar Kylian Mbappe tops CIES' estimations at £225m.
Manchester City forward Raheem Sterling is the Premier League's most valuable at almost £190m.
Liverpool's Alisson Becker is the goalkeeper with the highest price-tag on the list at £75m.
Top ten estimated most expensive players in the top-five European leagues (via CIES Football Observatory)
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€265.2 Kylian Mbappé (Paris St-Germain), €223.7 Raheem Sterling (Manchester City), €175.1 Mohammed Salah (Liverpool) , €168.9 Jadon Sancho (Borussia Dortmund), €155.6 Sadio Mané (Liverpool), €150.5 Harry Kane (Tottenham Hotspur), €134.3 Marcus Rashford (Manchester United), €125.5 Lionel Messi (FC Barcelona), €123.6 Antoine Griezmann (FC Barcelona), €115.7 Lautaro Martínez (Inter Milan)
