There were many factors that influenced Real Madrid's reaction against Chelsea after the hosts went 3-0 down at the Estadio Santiago Bernabeu on Tuesday night.
Luka Modric's brilliant assist to set up Rodrygo Goes' goal, Eduardo Camavinga's ball recovery that led to Real Madrid's second goal and the boost received by the fans were some of them, but Los Blancos' fitness level might be one of the most important.
The work and preparation of fitness coach Antonio Pintus and Carlo Ancelotti helped the Real Madrid players be at the physical levels required for teams who are competing for titles in this decisive part of the season.
Despite Chelsea bettering Real Madrid's numbers during the 90 minutes, Los Blancos registered better average speed (from 14 to 21 km/h) and high speed (from 21 to 24 km/h) in extra time.
Meanwhile, Ancelotti's man prevailed in recorded sprints, which is considered to be one of the most decisive factors in top-flight football.
Chelsea dominated the physical duels from minute one until about midway through the second half. From that moment on, Real Madrid bounced back until Rodrygo pulled one back to send the game to extra time.
Karim Benzema netted a second in the 96th minute and Real Madrid bettered Chelsea's figures in terms of fitness response in the remaining minutes.