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.
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