The report claims that the former Hoffenheim man has been withdrawn from Brazil’s upcoming squad due to injury and will therefore be absent for the Reds’ trip to the south coast.
The Brazil international has been in sparkling form of late, scoring Premier League seven goals and grabbing a further four assists since the turn of the New Year.
His form has helped Liverpool mount a late charge for a top four spot, while the club are going strong in Europe League following a recent 3-1 round of 16 aggregate win over Manchester United.
It took a while for Firmino to get going at Anfield, yet his superb displays of late have illustrated exactly why the club courted him for much of last summer and paid big to bring him to Merseyside.
The 24-year-old came off during the 1-1 draw with United on Thursday with five minutes to spare, yet this was deemed a tactical switch rather than anything related to an injury.
It remains to be seen whether Firmino picked up a strain or injured himself in training days later, with the club not issuing any sort of official statement one way or the other.
The Mirror quote the Brazilian FA’s official site as saying: "The striker Jonas, of Benfica, is summoned for the matches against Uruguay and Paraguay. Jonas is listed in place of Roberto Firmino.”
Southampton have been improving of late so the game represented a new challenge for Jurgen Klopp’s side, and with Firmino reportedly absent, their bid to secure all three points becomes a little tougher.