The Brazilian missed the Reds’ final friendly of pre-season, last weekend’s 3-1 victory over Athletic Bilbao in Dublin, as one of several key absentees.
And while Jurgen Klopp‘s side prepare to kick off the 2017/18 campaign at Vicarage Road this weekend, the Brazilian looks set to stay on the sidelines.
According to the Telegraph, Coutinho is yet to return to training, and “he is running out of time to prove his fitness for the trip.”
The 25-year-old is said to have attended Melwood every day to undergo treatment, however, belying suggestions his absence is due to speculation over his future.
Barcelona are believed to be pursuing a deal for the No. 10, but Liverpool are adamant they won’t part ways with Coutinho this summer.
Coutinho’s absence in Hertfordshire will be a blow, with Klopp restricted by a series of fitness issues as he prepares to name his squad for Saturday’s 12.30pm kickoff (BST).
James Milner will also be considered for a starting role in the middle of the park, having moved from left-back into midfield against Bilbao.