For Liverpool fans, it won't be the first time they have lost a big name player to Barca, with the Catalonians stealing both Luis Suarez and Javier Mascherano in recent years.
Barca, who sold Neymar to Paris St Germain last week for a world-record £200.6m, made their offer on Wednesday having already had a £72m bid for Coutinho turned down in July.
Coutinho missed Liverpool's thrilling 3-3 draw with Watford on Saturday with a back injury and Klopp stressed afterwards that his focus is on the players at his disposal, although he hinted he might not have final say on the former Inter man's future.
Can Liverpool afford to let Coutinho go?
The Brazilian worldwide has been in the headlines today as he's set to sit out the Reds' Premier League opener against Watford tomorrow afternoon with a back injury but his long-term future at Anfield is in serious doubt.
But I don't think so because I think it was pretty clear what the club, FSG, said about it.
Liverpool have denied receiving any such request and yesterday morning, Fenway Sports Group released a statement saying "no offers will be considered" for Barcelona target Coutinho this summer, with manager Jurgen Klopp backing the owners' sentiments.
Has Coutinho really submitted a transfer request?
That news emerged only hours after Liverpool's owners had issued a statement stressing their stance that the 25-year-old would not be sold during the current transfer window.
"He has back problems and has not been training since last Friday".
Lallana is missing extended time, but it gets more complicated when Phillipe Coutinho and Daniel Sturridge are also in doubt.
When asked if his job was now to keep Coutinho happy, Klopp added: "I can't keep players happy". At this moment, I'm just concentrating on my team. Positive things aside, Liverpool are missing a handful of players to face the Hornets.