Robin Le Normand might miss Thursday's match at Old Trafford due to a physical concern, according to COPE.
The French centre-back allegedly has a "bone damage due to mechanical stress in the second metatarsal of the left foot," according to the Spanish outlet.
To put it another way, he is a "doubt" for the game against Manchester United which could be a pivotal game for both teams in the fight to get out of the group.
That's a major setback for Real Sociedad, as Le Normand has been a key member of their defensive unit and has played the full 90 minutes in each of their four La Liga games this season.
Real Sociedad sit 9th currently in La Liga after two wins, one draw and one loss. With United not having greatest of records against Spanish opposition in Europe, they could prove a real test.
How it looks heading into Thursday?
Real Sociedad had a respectable La Liga season, finishing with seven points after four games and only losing to Barcelona at Camp Nou.
Erik ten Hag would love to get his his first European campaign at Old Trafford underway with a win that could prove so pivotal in the club goal of securing Champions League football, with qualification through the Premier League so difficult this could prove a way to sneak into the European tournament.