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But just how big a transaction are we talking?
The latest bid for Wirtz is worth a guaranteed $135 million (£100 million) with a further $18 million (£13 million) arriving in add-ons.
That totals a full package valued at $153 million (£113 million) — comfortably a record deal for Liverpool.
Including add-ons, Darwin Nunez cost up to $115 million (£85 million) when he arrived from Benfica in 2022.
Virgil van Dijk is next on the list at $101 million (£75 million), with Alisson Becker third at $88 million (£65 million).
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Dominik Szoboszlai was around $81 million (£60 million), while Naby Keita completes the top five at $69 million (£51 million).
Enzo Fernandez cost $145 million (£107 million) when he moved to Chelsea from Benfica, while Declan Rice's switch to Arsenal cost $142 million (£105 million).
Jack Grealish's move to Manchester City from Aston Villa was worth $135 million (£100 million).
Romelu Lukaku, moving to Chelsea in 2021, makes up the top five at $131 million (£97 million).
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