The Reds enjoyed an impressive 2-0 win over AC Milan last week but that has been book-ended by defeats to Chelsea and Roma.
The performance against the Italians was so bad manager Jurgen Klopp had to confirm that his side had bothered to train beforehand.
Barcelona beat Celtic in their first game in this tournament before they play Leicester City on Wednesday in Stockholm, Sweden.
When is Liverpool v Barcelona?
The game takes place on Saturday August 6th with kick-off at 17.15 BST.
Where is the match being played?
Liverpool and Barcelona will meet at Wembley Stadium so there will be home advantage of sorts for the Reds.