Barcelona have confirmed Neto suffered an ankle injury in the second half against Ibiza.
Neto suffered the injury when he collided with team-mate Clement Lenglet and an Ibiza player in the 50th minute of the 2-1 victory.
The 30-year-old Brazilian was able to complete the match but will undergo testing on Thursday to determine the extent of the issue, Barca confirmed in a statement.
Neto was making his fourth appearance for the club since arriving from LaLiga rivals Valencia in the close season.
— FC Barcelona (@FCBarcelona) January 23, 2020
Barca needed two late Antoine Griezmann goals to avoid embarrassment against their third-tier opponents, who took a shock ninth-minute lead through a Josep Caballe deflection.
First-choice keeper Marc-Andre ter Stegen will almost certainly return in goal for Saturday’s LaLiga trip to Valencia, with 20-year-old Inaki Pena in line to serve as a deputy.