Barcelona manager Hansi Flick and sporting director Deco are said to be in agreement that the club need to strengthen both full-back positions.
The Catalans are short of options on both flanks currently. Alejandro Balde is first choice on the left but missed the draw against Celta after picking up a knock.
Gerard Martin came in for Balde again but has really struggled to impress in the first team this season and was hooked at half-time and replaced by Hector Fort.
Over on the opposite side Jules Kounde has made the right-back slot his own, despite preferring to play centrally, with Fort also playing back-up to the Frenchman.