25-year-old Coutinho was subject to a series of bids from Barcelona towards the end of the transfer window, as the La Liga outfit were desperate to add to their squad following the loss of Neymar to Paris Saint-Germain.
Whether or not the back injury excuse was legitimate, and how serious or minor the supposed back injury was, either way, it's officially over now.
Coutinho returned home via private jet on Wednesday with club-mate Roberto Firmino, Manchester City trio Ederson, Fernandinho and Gabriel Jesus and Chelsea's Willian after the three Premier League clubs once again pooled their resources to ensure their players were back in the country as soon as possible.
With time left to train ahead of the fixture, Coutinho could feature for the Reds for the first time this term.
The Brazil worldwide wanted to make the move to the Nou Camp but Liverpool held firm and turned down at least three bids from the Catalan giants, who were prepared to pay over £100m to land the 25-year-old.
Klopp's side thumped Arsenal 4-0 without Coutinho last time out and the German could made a decision to play the same team.More news: Sensational Syria seal World Cup 2018 play-off spot
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I never thought there was any prospect of Liverpool selling Coutinho this summer.
"I know him [and] that is not his way".
He played the final 14 minutes and scored the second goal after coming off the bench in his side's 2-0 victory over Ecuador on September 1 and, just four days later, played another 15 minutes as a substitute in the 1-1 draw with Colombia.
"Yes, he will now do a little bit more than the other boys but he showed up in a very, very good mood and looks really promising".