Southampton have agreed to pay add-ons worth £1.2m as part of the deal for Ben Brereton Diaz, according to the Sun.
Saints are moving to bring in the Chile international and have a deal in place with Villarreal for his services.
They will pay a fee in the region of £7m to sign the attacker, who spent the second half of last term on loan at Sheffield United.
The deal though will also contain add-ons which could take the final cost higher and those add-ons are worth £1.2m.
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