Housing the greatest players in the game is all well and good when things are going to plan - as they currently are for both Manchester City and Erling Haaland.
But dealing with ambitious professionals can be difficult for any boss and high-profile transfers are a relatively common - albeit sometimes surprising - part of modern football.
Neymar's £198million transfer from Barcelona to Paris Saint-Germain in 2017 - which remains a world-record fee - is arguably the most dramatic deal of the modern footballing era. While in the Premier League, Real Madrid snapped up Chelsea's Eden Hazard in 2019 and Manchester United's Cristiano Ronaldo in 2009, and the Blaugrana poached Liverpool trio Philippe Coutinho, Luiz Suarez and Javier Mascherano in 2018, 2014 and 2010 respectively.
