Ronaldo sat out Saturday 's match in favor of resting his injured left knee for Champions League play next week .
Illarramendi stepped in for his captain and helped take down the club that nurtured his talents from youth to first team .
Ronaldo sat out Saturday 's match in favor of resting his injured left knee for Champions League play next week , and Illarramendi stepped in for his captain and helped take down the club that nurtured his talents from youth to first team .