The holders relinquished their grasp on the trophy after four seasons, going down 2-1 at the Benito Villamarín Stadium.
The defeat will increase the pressure on Valverde but Bartomeu backed him after the match.
“We’ve been thinking about next season for some time, but this isn’t the moment to explain what will happen,” he said.
”We won the league, so it has been an important season. Valverde has a contract and is the coach.
”This defeat was not the fault of our coach. We had many chances and the ball didn’t go in.”
Source | Marca
Valverde has received backing from Bartomeu, Lionel Messi and Gerard Pique in recent days, but it’s still difficult to see how he can survive at Barcelona after another damaging defeat.