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.

India thump Namibia ahead of Pakistan clash
Italy crush Nepal in maiden T20 World Cup victory
Dubai Duty Free Tennis Championships reveals major expansion plan
Sri Lanka crush Oman for second victory in T20 World Cup
Philippine's rising star Alexandra Eala to debut at Dubai Tennis Open
