Considering the cumulative costs of an active transfer window have already seen Barcelona spend upwards of €140 million (Luis Suarez, Ivan Rakitic, Jeremy Mathieu, Claudio Bravo and Marc-Andre ter Stegen), there may well be an upper limit as to what the club can afford to pay for a defender - bearing in mind the manner in which FIFA are currently scrutinising clubs over Financial Fair Play.
Some of those costs have been offset by the sales of Alexis Sanchez to Arsenal (€42 million) and Cesc Fabregas to Chelsea (€33 million) but the Camp Nou club may have to look elsewhere having just been rebuffed by Paris Saint-Germain.
Barcelona slapped a "take it or leave it" offer of €43 million on the negotiating table for young centre back Marquinhos - a bid PSG have obviously just "left", according to MARCA.
Their three man shortlist of defensive candidates has now been reduced to one after Jan Vertonghen appeared to be committed to Tottenham Hotspur and now the Ligue 1 powerhouse have refused Barcelona the chance to even enter personal discussions with Marquinhos, 20.
Arsenal, therefore, may have to brace themselves for a bid for their captain Thomas Vermaelen, the last man on Barcelona's apparent hotlist of targets and a player who would no doubt be a far more affordable option than the dear Brazilian at PSG.
It is believed Vermaelen could be available for €15 million, yet his sale would leave manager Arsene Wenger having to re-enter the transfer market as teenage acquisition Calum Chambers, a right back, would arguably be the only centre back option should one of Laurent Koscielny or Per Mertesacker suffer injury.