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.

Shelton wins back-to-back Canadian Opens with victory over Nakashima
Swiatek defeats Rybakina to claim Canadian Open title
Dubai Police reminds football fans of stadium rules ahead of new season
Italy's Curtis betters own 50m backstroke world record
Bangladesh humble Australia on day one of Darwin Test
