The 30-year-old midfielder has made eight Reds appearances across all competitions so far this season, and most recently featured in the gutsy 3-2 comeback victory over Newcastle at Old Trafford.
Matic departed for international duty soon after that win, but he has now returned to the Aon Training Complex to complete his rehabilitation under the club’s guidance.
It remains to be seen if Nemanja will be available for our big Premier League game against his former club Chelsea at Stamford Bridge, where he had two separate spells as a player under Jose Mourinho.
The news of Matic’s injury follows Monday night’s announcement that his Reds team-mate Luke Shaw has also sustained a problem, which has forced him to return early from England duty.