Having missed victory at Burnley, it's claimed in Spain Coutinho has already informed Reds boss Jurgen Klopp he doesn't want to be considered for selection while the two clubs are in negotiations over risk of injury.
Coutinho is prepared to sacrifice a deeper run in the Champions League with Liverpool to force through the move - and Wednesday could be decisive.
Barca are expected to make a new offer to Liverpool for the Brazil international in the coming hours, with it reaching Catalan sources that the Premier League club are now demanding €160m to sell.
For his part, Coutinho has already told Barca the number he wants - No7. The shirt is currently occupied by wantaway midfielder Arda Turan.