The Argentinian has caught the eye in the last seven months, helping his country to World Cup glory and seeing his transfer value sky-rocket. Here, Planet Sport looks at what strengths Fernandez can bring to Graham Potter's Chelsea. Technical talent Fernandez' passing ability will be a welcome addition to Chelsea after they sold midfield operator Jorginho to Arsenal.
And Hakim Ziyechâs loan move to Paris St Germain appears to have collapsed after Chelsea messed up the necessary paperwork.
Calum Ross, assistant director in Deloitte's Sports Business Group, told Planet Sport: "Record transfer spend in January, surpassing the previous record of ÂŁ430m in January 2018. "(In terms of) a seasonal spend in 2022-23, Premier League clubs are now over ÂŁ2.5billion which highlights the level of capability of spend that they've got in the market at the moment." Premier League clubs also set a record for net transfer expenditure during a January window with a net spend of ÂŁ720m, eclipsing the previous record set in January 2022 (ÂŁ180m).