5. Philippe Coutinho – Liverpool to Barcelona

On 6 January 2018, Liverpool confirmed they had reached an agreement with Barcelona for the transfer of Coutinho. His transfer fee was reported to be an initial €120 million million, which could rise to €166 million with various clauses being met.
During his medical, he was diagnosed with a thigh injury sustained a few days before joining Barcelona, ruling him out for three weeks. He made his debut for Barcelona on 25 January 2018, in a 2–0 (2–1 on aggregate) win against his former club Espanyol in the quarter-finals of the Copa del Rey, coming on as a 68th-minute substitute for captain Andrés Iniesta
Transfer fee: €120 million