That’s over the proposed salary the Brazilian is set to be offered by the Catalan club.
Spanish outlet Don Balon claim that Gerard Pique is unhappy at the contract Coutinho could sign.
The reports say the Liverpool midfielder will be offered a £10.6m salary to play for the La Liga leaders.
Ivan Rakitic and Andres Iniesta are also unsure on Coutinho joining as it jeopardises their position in the side.
The reports claim a deal worth £133m (€150m) will secure the signing of the 25-year-old and could be announced this week.
Nike suggested a deal which would see Coutinho become a Barcelona player was done when they advertised kits with his name on the back.
A release from the sports company said: “Philippe Coutinho is ready to light up the Camp Nou.
“Get your 2017/18 Barcelona kit with the Magician's name on it.
GETTYLiverpool ace Philippe Coutinho is on the brink of a move to Barcelona
GETTYBarcelona star Gerard Pique will not be happy with Philippe Coutinho's contract
“Act fast - free personalisation only available until 6 January.”
Coutinho has been in fine form for Liverpool this season, netting 12 goals and providing nine assists in all competitions.
But Starsport understand Coutinho wants to have played his last game for the Reds, ruling him out of the game against arch rivals Everton in the FA Cup on Friday evening.