Barcelona utility man Sergi Roberto suffered a hamstring tear against Olympiacos in the Champions League on Tuesday evening.
The Spanish international started the game in Greece before pulling up around the 35th minute and being replaced by winger Gerard Deulofeu.
A statement on Barca’s official website explained that the youngster had torn his hamstring and will undergo further tests on Wednesday to determine the full extent and length of time unavailable.
Further reports suggest that the 25-year-old will miss around 4-5 weeks of action, meaning he will miss the most of November and December.
Barca boss Ernesto Valverde will now look to utilise summer signing Nelson Semedo or reserve Aleix Vidal in the right back role.
Semedo, who arrived from Benfica this summer has been impressive when given the chance, whilst Vidal has found playing time hard to come by and is expected to leave in January.
Valverde’s side failed to get past a stern Olympiacos on Tuesday evening, despite Luis Suarez hitting the crossbar and Lionel Messi coming close.
Barca now have one foot in the last-32 of the Champions League, having remained unbeaten in their opening four group games.
The Catalan side will now prepare to face Sevilla on the weekend, hoping to maintain their lead at the top of the La Liga table.