Teenage talent is among the most valuable in football with clubs looking to build for their futures but which young stars have switched for big money?
Getty10Pietro Pellegri – Genoa to Monaco – €25m / £22m
Already labelled the 'next Messi', Pietro Pellegri is the joint-youngest player to line up in Serie A. Born in 2001, he became the most expensive 16-year-old ever despite having played just 10 senior games for Genoa.
Pellegri also scored twice against Lazio, setting the record as the youngest player to score two goals in a game in one of Europe's top five leagues.
AdvertisementGetty Images9Anderson – Porto to Manchester United – €30m / £20m
When Manchester United tried to sign Anderson from Porto in 2007, they saw their work permit application turned down due to a lack of experience. United argued that at 19, it was impossible for him to have any more experience having helped Porto to back-to-back Primeira Liga titles.
The application was successful, but Anderson's time at Old Trafford was not as good as expected, despite playing over 100 Premier League games.
Getty Images8Gabriel Jesus – Palmeiras to Manchester City – €33m / £27m
An Olympic champion with Brazil, Gabriel Jesus won everything possible domestically before leaving Palmeiras for Manchester City. The striker made an immediate impact in the Premier League, scoring and assisting in his first league start for Pep Guardiola's side.
Injury curtailed his debut season, but he still ended the campaign with seven goals and four assists in 11 appearances.
Getty Images7Renato Sanches – Benfica to Bayern Munich – €35m / £27.5m
A sensation with Benfica in his native country, midfielder Renato Sanches was bought by Bayern Munich even before he won the Young Player of the Tournament award at Euro 2016.
Bayern had agreed to purchase him for €35m before the tournament, possibly saving themselves from a larger fee after his string of impressive performances as Portugal lifted the trophy.