The Reds midfielder had given Jurgen Klopp a scare after he was pictured at Spire hospital undergoing a scan following complaints of a tight hamstring after his return from international duty with Brazil. Coutinho is Liverpool's in-form player and has been key in helping them reach the summit in the Premier League one point ahead of Chelsea in second place.
According to the Liverpool Echo, the Brazil international was pictured boarding the flight with the rest of the squad, which will come as a big boost as they look to maintain their nine-game unbeaten run in the league. Coutinho forms a vital part of Liverpool's attacking triumvirate alongside Sadio Mane and Roberto Firmino and has been responsible for more than half of the Reds' 30 goals in 11 games this season, which is the highest in the league.
The former Inter Milan midfielder has come into his own this campaign and is the Merseyside club's in-form player at the moment. He has recorded two goals and three assists in the last three games and this has attracted interest from top clubs across Europe. Barcelona have been constantly linked in recent weeks, but Klopp is confident he can retain his best players despite interest from outside.
The German coach will be delighted to have Coutinho's services for the clash against the Saints, but they will be without Adam Lallana, who has failed to recover from a groin injury he suffered while playing for England against Spain on Tuesday (15 November).
The midfielder will miss the clash against his former employers, but the Merseyside club are yet to reveal the true extent of the injury after the manager revealed that he is yet to undergo a scan on Friday. Lallana's absence will be a blow as he has been in good form for club and country this season; his place in the starting XI is likely to be taken by Georginio Wijnaldum, who has lost his place in the starting XI to Emre Can in recent weeks.