Philippe Coutinho has been left out of Liverpool’s squad for Tuesday’s Champions League play-off first leg against Hoffenheim.
The 25-year-old midfielder submitted a transfer request last week, days after the club rejected a 100 million euros (£90m) bid from Barcelona.
He missed Saturday’s Premier League opener with Watford with a back injury.
Speaking after the 3-3 draw, boss Jurgen Klopp said he expected the Reds’ owners to refuse to sell the player.
Barca have moved for the Brazilian after selling compatriot Neymar to Paris St-Germain for a world record transfer of £200m.
Coutinho signed a new five-year deal in January, which did not include a release clause.
Liverpool start their European campaign with the first leg at the Rhein-Neckar-Arena in Germany, with the return clash at Anfield on Wednesday, 23 August.
The winner will progress to the group stage of the Champions League.
