Manchester United and Arsenal unexpectedly experienced the most significant price hikes in Europe.

Tomas Soucek of West Ham has been the player with the most notable increase in transfer value over the past month, while Aaron Wan-Bissaka of Manchester United and Kai Havertz of Arsenal also feature in the top 10 players with the strongest price hikes.Soucek witnessed his value soar by €10.71 million in the January transfer window. This significant leap can be attributed to the midfielder's decision to sign a new contract with the club, lasting until 2027, an agreement announced on January 1st. The Estimated Transfer Value (ETV) of the Czech Republic international, calculated using hundreds of data points within the profession as well as external factors such as age and contract status, is currently €29.7 million.
Another player who experienced an increase of over €10 million in ETV is forward Marcos Leonardo, who left Santos to join Benfica. Initially pursued by Arsenal, the Portuguese club eventually secured his signature for a reported fee of €13.9 million, subsequently witnessing his ETV soar to €23.1 million, demonstrating that Lisbon's club received a worthy return on their investment.
The top 3 players with the highest increase in Estimated Transfer Value (ETV) over the past month (in million euros) are:

1. Tomas Soucek - West Ham - 10.71
2. Marcos Leonardo - Benfica - 10.44
3. Joao Neves - Benfica - 9.94

Here's the complete list of the top 10 players with the highest increase in ETV:

1. Tomas Soucek - West Ham - 10.71
2. Marcos Leonardo - Benfica - 10.44
3. Joao Neves - Benfica - 9.94
4. Eder Militao - Real Madrid - 9.58
5. Christian Pulisic - AC Milan - 9.36
6. Lukas Klostermann - RB Leipzig - 8.48
7. Weston McKennie - Juventus - 7.87
8. Aaron Wan-Bissaka - Man Utd - 7.22
9. Michael Olise - Crystal Palace - 7.16

Kai Havertz - Arsenal - 7.05In addition to Soucek, other Premier League players who saw significant jumps in their transfer values include Wan-Bissaka (€7.22 million), Michael Olise of Crystal Palace (€7.16 million), and Havertz (€7.05 million), all of whom made it into the top 10. Meanwhile, Eberechi Eze of Palace also experienced a substantial increase of €6.8 million. Manchester United's star has performed admirably under Erik ten Hag and is rumored to be close to extending his contract. On the other hand, Kai Havertz, after months of criticism at Arsenal, has started to deliver quality performances, including a recent surprising 3-1 victory over Liverpool, where he provided an assist and forced Liverpool to be reduced to 10 men.

1. Two US internationals also made it into the top 10 of this list. Christian Pulisic's ETV is currently €48 million, with an increase of €9.36 million in the previous month, while Juventus star Weston McKennie's value rose by €7.87 million. Another notable name in the top 10 is Real Madrid's defender Eder Militao, whose value increased by €9.58 million, possibly due to a new contract at Bernabeu.