Free-scoring Darwin Nunez for £60m, a Man United target valued at £48m - and THREE £41m+ stars from Sporting's talent factory: Meet the 20 most valuable players outside Europe's 'Big Five' leagues

Darwin Nunez and Antony dos Santos are the highest valued players outside of Europe's 'Big Five' leagues, according to a new study published by the CIES Football Observatory.

Highly-rated Benfica striker Nunez is valued at £60million, Manchester United target Antony has a £48m valuation, and there is whole host Sporting Lisbon, Porto and Ajax stars among the top 20 on the list.

Below the leading pair is Lisbon defender Goncalo Inacio at 44m and PSV Eindhoven striker Cody Gakpo at £42m.

Benfica striker Darwin Nunez is the most valued player outside of Europe's 'Big Five' leagues

Sporting Lisbon's Goncalo Inacio is the third most valued

Ajax winger Antony dos Santos (left) and Sporting Lisbon defender Goncalo Inacio (right) are the second and third most valued

PSV Eindhoven striker Cody Gapko (pictured) is among the top five most valued footballers

Further down the list is Lisbon duo Matheus Nunes and Pedro Goncalves both valued around £41m.