Real are struggling to keep pace with rivals Barcelona.
Ronald insisted: "From today to tomorrow we can improve a lot and we will do. Maybe we're not feeling so comfortable but it is normal. We have to keep going. There are still a lot of league matches left, the Champions League, the cup ...
"Five points is a big advantage but we have to keep working to make this a phenomenal season. I've seen bigger gaps that have been cut. That's football. We have to keep working hard and improving."
For breaking stories and all the great banter like us on Facebook: facebook.com/tribalfootball