Barcelona's 2-1 home victory over Villarreal in La Liga was overshadowed by Lionel Messi's half-time exit due to a fresh injury.
Coach Ernesto Valverde, however, stressed that the decision to replace Messi with Ousmane Dembele was only a precautionary step.
"When something happens to Messi, everyone stops, not only on the field, but in the stands as well," Valverde said.
"It is a small problem in the adductor and as a precaution we have decided not to risk it. In theory, it is nothing more but we will see tomorrow how it is."
Messi had missed more than a month at the start of the season with his calf issues in early August.
The victory takes Barcelona up to fourth with 10 points after six games.

Fernandes equals league assist record in United's 3-2 win over Forest
UAE Team Emirates XRG's Jhonatan Narváez claims Giro d’Italia stage victory
Chelsea confirm Xabi Alonso appointment on four-year deal
McIlroy roars back into contention with third-round 66 at PGA Championship
Semenyo magic hands Man City 1-0 FA Cup win over Chelsea
