Diogo Jota is a doubt for Liverpool's trip to Watford on Saturday after he was sent home early by Portugal.
Jota had not trained with his national team since being left out of the weekend friendly win over Qatar due to a muscle injury.
The Portuguese Football Federation said: "Diogo Jota was dismissed by the national team manager Fernando Santos, after being considered unavailable by the FPF Health and Performance Unit to face Luxembourg, in a meeting to be held this Tuesday.
"The Liverpool player, who has already left the stage of the national team, has done conditioning work since the beginning of the international break, having also missed the match against Qatar."
Need a VPN? Or seeking to switch? Then support Tribal Football by clicking here to sign up with our official partners NordVPN. Not only will you receive the best VPN experience, but also great discounts by signing up via Tribal Football. Thanks for your support!