Paul Pogba will miss Manchester United's Premier League match against Middlesbrough on Sunday and withdraw from the France squad due to the hamstring injury he suffered against Rostov.
United manager Jose Mourinho confirmed Pogba will be sidelined after having to be replaced two minutes into the second half of Thursday's Europa League victory over the Russians.
Mourinho's men won 1-0 on the night at Old Trafford to seal a 2-1 aggregate triumph in the last-16 tie, but saw the France midfielder limp off to be replaced by Marouane Fellaini.
The 24-year-old gestured to his leg and headed straight down the tunnel after sustaining the problem when pressing a Rostov player, applauding the home fans on his way off.
"Yes, hamstring," Mourinho said of Pogba's injury at his post-match media conference.
"I don't know for sure how long, but no Middlesbrough and no national team."
Pogba had been named in France's squad to face Luxembourg in World Cup qualifying and Spain in a high-profile friendly for next week's international break.