"It's been frustrating after my red card and my operation and coming back from injury but it's 90 minutes under my belt which I needed," Bale told Sky Sports News after his side's win.
"It was very difficult fitness-wise but I am getting there slowly and I think with every 90 minutes now I will keep improving and getting better and stronger.
"My injury still hasn't fully adapted yet. I've spoken to people who have had this injury before and it takes a bit of time to adapt back to playing full-time and everything so I have to be patient, but also I have to keep working hard."
The result means that Real have extended their lead at the top of La Liga table to five points.