West Ham remain in advanced talks with Lazio over the signing of midfielder Felipe Anderson, according to Sky sources.
It is understood the clubs are edging closer to an agreement on a fee, the payment structure and potential clauses after negotiations had stalled over the past couple of weeks.
Sky sources understand the fee would break West Ham's current transfer record, with the Hammers having spent a record £21.9m on defender Issa Diop earlier this summer.
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There is a willingness from all parties to make the move happen but the difficult nature of the deal is potentially further complicated by the player's personal terms which could yet scupper the transfer.
The 25-year-old, capped once by Brazil, joined Lazio from Santos in 2013 and has since scored 34 goals in 177 appearances.
New West Ham manager Manuel Pellegrini has been busy in the transfer market this summer, adding Diop, goalkeeper Lukasz Fabianski, right-back Ryan Fredericks and midfielder Jack Wilshere to his squad.
Sky sources understand Borussia Dortmund forward Andriy Yarmolenko is undergoing the first part of his medical ahead of a £17.5m move to West Ham.