Real Madrid coach Zinedine Zidane admits Marco Asensio's knee injury could be serious.

The winger broke down during Real's friendly against Arsenal last night.

Asked if it is worrisome, Zidane said, "Hopefully not, but yes. We're a little worried. It's the knee. He went straight to the hospital to get tested and see. But it looks bad.

"It's the bad thing of the day for us, because we lose a player and we are a little touched, yes."

It was suggested Asensio's injury could mean Bale being taken off the transfer list.

But Zidane added: "It has nothing to do with one thing. We are all touched by Marco, hopefully as little as possible, it's just that."