~Snip~
Is it a proof that they are playing badly this season? Or is it a proof that they had way too many injuries to their defense all year long, which made all the defenders that are left, have to play every single game, and that makes them incredibly tired, which causes them to lose games?
Yes, Real Madrid played very badly this season, especially in the back line after several key players were injured. I'm not highlighting the Midfielders and Strikers, they are still able to create opportunities and turn them into goals. Madrid's weak point lies in the back line, they have conceded 11 goals in their last 4 games in all competitions, including when they were humiliated by Arsenal in the UCL quarter-finals.
If fatigue is the reason for Real Madrid declining performance, they will be in danger of losing the title that could be won in the rest of the season.