Philippe Coutinho — Liverpool to Barcelona (2018) — €160 million

Philippe Coutinho's €160 million move from Liverpool to Barcelona in January 2018 was the third most expensive transfer at the time, funded by Neymar's €222 million sale. However, Coutinho failed to replicate his Liverpool form, scoring only 24 goals in 106 appearances for Barcelona and being loaned to Bayern Munich, where he won the Bundesliga before joining Aston Villa for €20 million—a 87.5% drop from his fee. His career became a cautionary tale about transfer fees distorting expectations, with his cost exceeding the £100 million of #4 Grealish but yielding significantly less return on investment per goal scored.