Sadio Mane will have scans on a possible shoulder dislocation after getting injured during Liverpool training.
The Reds winger, who scored in the 4-3 win over Arsenal on Sunday, took a knock to the arm at Melwood and was taken to hopsital.
Should Mane's injury be serious, it will be a huge blow to Jurgen Klopp's side who have enjoyed a solid pre-season and opening day victory.
Mane, who joined from Southampton in a £30million deal, has impressed for the Merseyside club with his pace and direct running.