Daniel Sturridge went off with a thigh injury after scoring in Liverpool’s 3-0 win over Bayern Munich in the Audi Cup.
The England striker, 27, scored 15 minutes after coming off the bench by chipping in the Reds’ third goal.
But he immediately pulled up and was substituted on 87 minutes, with boss Jurgen Klopp saying he hoped “it’s nothing serious”.
Sadio Mane and Mohamed Salah also scored as Liverpool set up a final against Atletico Madrid on Wednesday.
Liverpool, who remain unbeaten during their pre-season campaign, will play Atletico Madrid in Munich on Wednesday (14:30 EST) before their final friendly of the summer against Athletic Bilbao in Dublin on Saturday.