Juventus coach Massimiliano Allegri hailed the impact Cristiano Ronaldo was having on the Italian champions as the Portuguese star became the first player to achieve 100 Champions League wins in Tuesday's 1-0 success over Valencia that clinched their passage to the knockout rounds.

Ronaldo, 33, played a key role against Valencia providing the assist on 59 minutes which Croatian Mario Mandzukic tapped in for his third goal in as many matches.