Real Madrid have no other choice other than winning or else they will complicate their own calculations for the title.
It was obvious that Barcelona and Atletico Madrid will win their games easily since their opponents are quite weak, sitting at the end of the table and trying to escape relegation.. For Real Madrid, they will face home Girona with a good odds in their favour and a recent history of defeating it without taking many goals.
The current standings are like the position at the beginning of the season and Madrid are back in a situation that is challenged to rise. Even if Madrid wins they still can't be comfortable because the distance from Barcelona and Atletico Madrid is small. As the end of the season approaches, it is quite difficult for us to determine which of these 3 teams will be able to win the trophy. And if based on the chances Barcelona looks promising as long as they don't slip. Real Madrid today must not lose 3 points, if they fail once then their chances will be even more difficult to catch up to the first position.
I think Real Madrid themselves are responsible for Real Madrid's position falling from number one. Real Madrid have failed to get full points against some easy opponents in the last few matches mainly because of their low points tally whereas Barcelona have consistently got full points against every team which is why they have narrowed the points gap they had with Real Madrid and now they are top of the points table with more points. But we all know that Real Madrid can come back at any time because this team's performance is never in doubt. If there is a chance in the last match of the season that Real Madrid can retain the La Liga title if they win the last match then I think they can win that match too. Now that Barcelona are not losing points in any match, Real Madrid will have to walk the streets of Barcelona, meaning they will not lose points in any match. By performing better than Barcelona they need to go back to the top of the points table and stay ahead of everyone in the title race.