The full-back was afforded a rare start in the Canary Islands as Zinedine Zidane’s men secured a dramatic win, Casemiro netting a late winner after the hosts had equalised in the 87th minute.
The 33-year-old has made just four Liga appearances for Madrid this season and admits he expects to leave at the end of the season when his current contract expires.
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"I am aware that I have little time left here,” he told reporters.
"Now I've only got a few games left and I train a lot on my days off. It's a situation that had to come and I thank the coach for giving me the opportunity to play."