Barcelona have spent the last few weeks aiming to prise Coutinho away from Liverpool.
Having lost Neymar to Ligue 1 giants Paris Saint-Germain, the Catalan giants have £200million in the bank account - which they plan to use on a marquee name.
Borussia Dortmund’s Ousmane Dembele is among their major targets but, at the moment, Coutinho in their priority.
Liverpool boss Jurgen Klopp has repeatedly insisted the Brazil international will not be leaving, saying he wants all his best players to still be at the club by the time the transfer window shuts.
But ESPN Brazil say the Reds have accepted an offer worth £90m for Coutinho.
It is said that, following a meeting between Barcelona and Liverpool chiefs, the Catalan giants are convinced they have landed their man.
The transfer will make Coutinho Barcelona’s all-time record signing, and the player has supposedly told the Reds he is determined to make the move to the Nou Camp.
Barcelona are not ruling out a deal being announced by Wednesday, meaning he could make his debut against fierce rivals Real Madrid on Sunday.
Ernesto Valverde’s men will lock horns with their fierce rivals in the first leg of the Super Cup, a trophy Real will be aiming to retain after scooping it last season.
The report adds Barcelona are determined to also sign Dembele and Real Sociedad defender Inigo Martinez.