Real dropped two more points against Levante on Saturday, with Ronaldo being substituted by coach Zinedine Zidane.
Diario Gol says Ronaldo blames Zidane's fitness coach, Antonio Pintus, as key reason for the team's woes this season.
Ronaldo believes their second-half fade-outs is due to Pintus' work, where the players have been struggling for match fitness consistently. The Portuguese has even taken on a personal trainer this season in order to make up the work he feels he isn't receiving at the club.
Ronaldo is also angry with Zidane for standing by Pintus, even when the players have pointed out their fitness levels are low in team meetings.