Sancho, Vinicius & the most valuable young stars on the planet

The Borussia Dortmund and Real Madrid stars are among the list of the most expensive talents currently shining in Europe's best leagues

The CIES Football Observatory has compiled a list of the most valuable players under the age of 20 currently playing in Europe's top five leagues.

There is a wealth of promising young players excelling in the continent's strongest leagues, with the likes of Jadon Sancho, Vinicius Jr, Kai Havertz and Callum Hudson-Odoi all making their name in the game.

Here, Goal looks at the list's top 25 to see who will be the most expensive of all Europe's young stars.

Thearon W. Henderson
25DIEGO LAINEZ | Real Betis | €16m
The 18-year-old Mexico winger earned a move to the Spanish top-flight after excelling in his homeland with Club America.

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24FRAN BELTRAN | Celta Vigo | €17.2m
The 20-year-old central midfielder has played a key role for Celta since making the step up from the Spanish second tier.
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23FERRAN TORRES | Valencia | €17.9m
Valencia's youth academy has produced another first team star in the form of 19-year-old winger Torres, who already has 50 senior games to his name.

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22DAN-AXEL ZAGADOU | Borussia Dortmund | €19.5m
The 20-year-old joined the Bundesliga side from Paris Saint-Germain two years ago and is benefiting from first-team action in Germany.
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21MOISE KEAN | Juventus | €20.3m
Kean has been a rising star in Italian football, chipping in with seven goals in 15 games this season for the Serie A champions.
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20CALLUM HUDSON-ODOI | Chelsea | €20.3m
It's no surprise Bayern Munich have been convinced of his quality and that Chelsea have remained determined to hold on to him. The 18-year-old looks destined to reach great heights for club and country going by performances so far.
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19OZAN KABAK | Stuttgart | €20.8m
The defender has proven himself as a very promising player after impressing at Galatasaray to earn a January move to Stuttgart this year.
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18PHIL FODEN | Manchester City | €21.9m
The 18-year-old is pushing for a regular spot in Pep Guardiola's team after making a big splash in the youth system. He already has seven goals to his name for the senior side.
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17BOUBACAR KAMARA | Marseille | €26.6m
Just 19 years old, Kamara has already made himself a key player at Marseille after his breakthrough last season. The centre-back has featured 29 times in Ligue 1 this year.
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16ALBAN LAFONT | Fiorentina | €28.3m
He is just 20 years old, but Lafont is already experienced for his age. He made over 100 first team appearances for Toulouse before making the summer switch to Italy, where he has been a mainstay for Fiorentina this term.
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15DWIGHT MCNEIL | Burnley | €28.6m
A former Manchester United youth player, McNeil finished his education at Burnley before emerging in the first team, making a big impact for Sean Dyche's team.
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14PEDRO PORRO | Girona | €29.4m
Porro can play anywhere down the right side of the field and has made himself vital for Girona, playing 31 times in La Liga.
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13DIOGO DALOT | Manchester United | €30.2m
Another bright young star to emerge from Porto's renowned youth system, Manchester United moved quickly to snap up the Portuguese full-back last summer. He is yet to break into the Red Devils senior side, but time is on the 20-year-old's side after he joined on a five-year contract.
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12SAMUEL CHUKWUEZE | Villarreal | €35m
The Nigeria international winger has been busy on the right flank for Villarreal, scoring 10 goals in 46 games this term.
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11IBRAHIMA KONATE | RB Leipzig | €40m
The 19-year-old has developed a reputation as a solid centre-back amid his exploits in the Bundesliga.
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10RYAN SESSEGNON | Fulham | €43.5m
The Fulham star has emerged as one of his country's brightest prospects in recent years and been a regular for the Premier League team and the England Under-21s.
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9EVAN N'DICKA | Eintracht Frankfurt | €44.1m
Since his move from Auxerre last year, the defender has slotted into one of Europe's most exciting teams this season. N'Dicka, 19, has been a permanent fixture in a team gunning for a spot in the Europa League final.
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8JUSTIN KLUIVERT | Roma | €44.3m
Things have not gone smoothly for the Netherlands international, but his potential was on display for all to see at Ajax last season and he has impressed in spells in Italy so far.
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7VINICIUS JR | Real Madrid | €55m
The Brazilian teenager has been established as one of the most promising young players in the world right now, prompting Real Madrid to make a big money move. He is already starring for the Liga giants and living up to the hype that surrounds him.
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6GIANLUIGI DONNARUMMA | AC Milan | €59.4m
The youngster was immediately tipped to replace Gianluigi Buffon as his nation's star goalkeeper and has already stepped into the legendary figure's spot.
With 160 AC Milan appearances to his name at the age of 20, Donnarumma is at the beginning of what could be a phenomenal career.
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5DECLAN RICE | West Ham | €64.2m
Another wonderful talent to emerge in England, Declan Rice looks destined for bigger and better things than West Ham, having already risen to the level of stardom in east London.
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4KAI HAVERTZ | Bayer Leverkusen | €64.3m
As resilient as the Germany international has been at the back, he has shown he is a danger up front, too, with 26 goals for Bayer Leverkusen in 103 first-team appearances.
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3NICOLO ZANIOLO | Roma | €67.4m
It's no surprise the Italian midfielder has already attracted interest from some of Europe's top teams, who are said to be lining up to buy him after just one season at Roma.
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2MATTEO GUENDOUZI | Arsenal | €70m
The French midfielder has been lively for Arsenal since joining from Lorient last summer.
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1JADON SANCHO | Borussia Dortmund | €150m
The 19-year-old winger tops the Bundesliga assist charts with 14 and 11 goals from 32 appearances this season.