Danny Welbeck has emerged as an early injury doubt for England's friendly against Brazil in the Maracana on Sunday.
The Manchester United striker did not come off the bench during Wednesday's 1-1 draw with the Republic of Ireland due to a knee injury.
And it appears that the 22-year-old is still being troubled by the problem as he missed the main part of England's training session on Friday evening.
Welbeck took part in the warm-up but sat out the rest of the hour-long open session, which took place at the Urca military base in Rio in front of around 500 spectators.
Fellow striker Jermain Defoe is carrying an Achilles problem but he took part in the entire session, which was good news for manager Roy Hodgson, who has already seen Andy Carroll, Daniel Sturridge, Tom Cleverley and Kyle Walker withdraw from the squad to face the Brazilians.