Lopez was snapped up from Sevilla last week.
After the 1-1 draw, he said: "Everything has been very positive. I've been at ease. At Bernabéu Stadium, with the responsibility it implies, I've always felt very good. We held our own in the first half and they were able to get few opportunities. With our enthusiasm and drive from the stands, we got a tie, which leaves the playoff open and we have the possibility of going on."