Swiss research group CIES Football Observatory have estimated transfer values of all the top players in Europe, and worked out who has increased the most in the last three months.
Romelu Lukaku, Kylian Mbappe and Neymar all make the cut after their big summer moves but who else makes the top ten?
10. Gianluigi Donnarumma (AC Milan) €39.9m to €65.1m and Mohammed Salah (Liverpool) €72.8m to £65.1m (both +€25.2m)
Both Donnarumma and Salah have seen their values increase by over €25m and are joint in 10th place. Salah completed a move to Liverpool from Roma over the summer and has scored four league goals so far, while Donnarumma signed a new deal with AC Milan and has played every league game this season.
8. Marcus Rashford (Manchester United) €71.8m to €98m (+€25.6m)
The 19-year-old striker has also seen his value increase by just over €25m after a great start to the season and has been a regular in Jose Mourinho's starting XI.
7. Kevin De Bruyne (Manchester City) €105.7m to €131.3m (+€25.8m)
The Belgian playmaker is in 7th place after enjoying a positive start to his 2017/18 campaign, which includes scoring the winner in the Premier League game against Chelsea at Stamford Bridge on Saturday.
6. Neymar (Paris Saint-Germain) €211.2m to €239.6m (+€28.4m)
While it might expected that the PSG world-record man would be higher up in the list, it is worth noting the rankings are on rises, rather than overall value, so the Brazilian star sits in sixth place.
5. Alex Oxlade-Chamberlain (Liverpool) €27m to €58.7m (+€31.7m)
Whilst the versatile midfielder hasn't enjoyed the best of starts to his Liverpool career since joining in the summer, CIES estimates the rise in his transfer value at over €30m.
4. Ousmane Dembele (Barcelona) €92.5m to €137.5m (+€45m)
Since the French winger's club-record move to Barcelona, his transfer value has increased by €45m, but his start has been hampered by a serious knee injury which could keep him out until the new year.
3. Paulo Dybala (Juventus) €113.7m to €161m (+€47.3m)
Dybala has started the season on fire for the Serie A champions and as such his transfer value has increased by over €45m.
2. Kylian Mbappe (Paris Saint-Germain) €95.4 to €145.8 (+€50.4)
After making the move from Monaco to PSG on the final day of the transfer window, the French teenager has enjoyed an encouraging start to his career in the French capital and his value has increased by over €50m.
1. Romelu Lukaku (Manchester United) €102.7 to €158.5 (+€55.8)
The Belgian striker has scored 11 times in his first 10 appearances at Manchester United so it is unsurprising that he tops the list with his value increasing by 54% in the last three months, over €55m.