Sevilla defense was the main factor in Real Madrid failure to win. Real Madrid had several good opportunities but Sevilla defenders played very disciplined and were always alert in blocking Real Madrid attacks. Real Madrid attack line also didn't play optimally, they wasted several opportunities that could have been goals.
Sevilla success in holding Real Madrid to a draw was due to good play from Sergio Ramos and his colleagues who guarded Sevilla defense area. Real Madrid has tried hard to get an additional three points, but Sevilla managed to make Real Madrid lose two points in this match which made the competition at the top of the standings even hotter.
That's exactly right, Madrid had several good opportunities but failed to score, on the other hand, Sevilla defense was also very strong with Sergio Ramos. The mention of Ramos playing for Sevilla still feels a little strange to me, and Alaba was the unlucky player to score an own goal. Carvajal appeared impressive and saved Madrid from defeat a few minutes later, I think a draw was fair enough for both of them.
The competition for the top four in the standings is indeed getting fiercer because the difference in points is very thin, however, Madrid is still leading the top of the standings for the time being. I was quite surprised by Girona performance, who are competing closely in the top four of the standings this season, it looks like they can finish in the UCL zone if they continue to be consistent with their current performance.