The 2021 summer transfer window will take some beating, with Lionel Messi moving from Barcelona to Paris Saint-Germain and Cristiano Ronaldo heading back to Manchester United from Juventus. But already there are a host of top players in Europe who have agreed a move on July 1.
Clubs across the English Premier League spent a colossal €1.6 billion last year, according to Transfermarkt, while even the January window saw €338 million splashed. For comparison, the Spanish LaLiga saw €300m spent in the summer, and just €78m in January.