​Liverpool have been a dealt possible injury setback after Senegal star Sadio Mane left international duty early, following concerns of a relapse of his previous injury. 

The Senegalese FA issued a statement regarding the matter on Sunday, citing 'an old injury' as the reason for his early departure from the squad, after he starred in their triumphant 2-0 victory over South Africa on Friday, securing their place at the World Cup Finals for the first time since 2002.

The full statement read, via the Liverpool Echo: "The Senegalese Football Federation informs the national and international opinion that, following the match South Africa against Senegal on Friday, November 10, 2017, in Polokwane, the player Sadio Mane was slightly felt (sic) from his old injury.

"After consultations between the medical staff of the national team of Senegal and Liverpool, it was decided by mutual agreement to make it available to his club to continue treatment until full recovery."

Mane left for international duty following his surprising return to Premier League action against West Ham, having been previously indisposed due to a hamstring injury sustained during the previous international break. 

Liverpool manager Jurgen Klopp had previously declared his desire for Mane not to be risked in their second game with South Africa this Tuesday should they win the first, clearly anxious about the star's fitness, while sent a Liverpool physio accompanied the star on duty to monitor his recovery.

The club will now have a nervy wait to find out whether the winger has suffered any serious damage, as they prepare for Saturday's game with Mane's former side Southampton.