The January transfer window is now in full swing in Europe - here are 10 of the most high-profile deals confirmed so far.
AFC Ajax confirmed the signing of Ivory Coast striker Sebastian Haller in a deal worth a reported €22.5 million, less than half the Hammers forked out to sign him from Eintracht Frankfurt in July 2019.
Scroll through the gallery to see the 10 most high-profile deals confirmed so far
While it's proved to be the most lucrative transfers so far, Manchester United are planning ahead for the future with the arrival of Haller's compatriot Amad Diallo.
The 18-year-old winger has joined in a move that could reach up to €40-million based on performance-related add ons during his time at Old Trafford.
Another major deal saw RB Leipzig rope in Dominik Szoboszlai from Red Bull Salzburg for €20-million, which could prove one of the bargains of the window for the Hungary wonderkid.