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Chelsea broke the world record transfer fee to sign USA centre-back Naomi Girma in January.

And this comes with United's overall debt hovering at about £1bn, including £331m in outstanding transfer fee payments, something minority owner Sir Jim Ratcliffe mentioned in his interview with BBC Sports Editor Dan Roan in March.

Onana has struggled to live up to his £47m transfer fee since his arrival from Inter Milan in 2023 but has played all 69 Premier League games since he joined the club.

Nevertheless, Onana has done little to justify his transfer fee – the fourth highest paid for a goalkeeper - which means Matic has a legitimate position to launch such an attack.

Sporting announced his transfer fee as £18.4m.