Arsenal's pursuit of Bruno Guimaraes has developed into one of the defining transfer sagas of the summer.
Interest first emerged before the World Cup, and reports revealed Mikel Arteta had identified the Newcastle captain as his priority midfield addition.
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The Gunners then had a £55m opening offer rejected, and since then, Arsenal have held discussions with the Brazilian's representatives, with Guimaraes telling Newcastle he wants to leave and join the Premier League champions.
A potential starting point for negotiations of around £75 million had been floated by the media too.
Newcastle, however, have consistently refused to soften their stance, insisting one of their most influential players will not be sold.
That position now appears firmer than ever.
Arsenal told mammoth new Bruno Guimaraes price tag as Newcastle hold firm
According to talkSPORT, Newcastle have informed Arsenal that any deal for Guimaraes would require a fee of around £100 million, creating a huge gap between the two clubs' valuations.
Bruno-Guimaraes
The report states Arsenal had hoped a package closer to £60 million might be enough, but Newcastle believe the current midfielder market justifies a figure far closer to nine digits.
The Magpies have already lost Anthony Gordon and Sandro Tonali, and are determined to avoid another high-profile departure unless an extraordinary offer arrives.
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Guimaraes remains the heartbeat of their midfield, while his importance has only increased following their other significant exits.
Newcastle are also understood to hope he will eventually commit to a new contract despite ongoing speculation surrounding his future.
Arsenal, meanwhile, have shown no sign of abandoning the chase.
Why Arsenal are refusing to back down in Bruno Guimaraes chase
Arteta is rumoured to view Guimaraes as a player capable of adding another dimension to an already formidable midfield.
Comfortable receiving possession under pressure, the Brazil international also offers defensive aggression, progressive passing and the leadership qualities expected from a player who has captained Newcastle.
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Those attributes explain why Arsenal have continued exploring the deal despite Newcastle's resistance.
Yet the latest valuation underlines the scale of the challenge facing the English champions.
A £100 million outlay would place Guimaraes among the most expensive signings in Arsenal's history and force the club to consider how such a move fits alongside other priorities during the remainder of the transfer window.
For now, neither side appears ready to compromise.
Arsenal remain convinced Guimaraes would elevate an already title-winning squad, while Newcastle continue to argue elite players command elite prices in the modern market.
Unless one club changes its position, the saga may continue for some time.
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