Champions League quarterfinal's 1st leg: Juve beats Monaco 1-0, Atletico holds Real

Juventus' forward from Argentina Carlos Tevez (R) vies with Monaco's French defender Layvin Kurzawa during the UEFA Champions League quarter final football match Juventus FC vs AS Monaco on April 14, 2015 at the Juventus Stadium in Turin. Juventus won 1-0. [Photo/CFP]

Monaco had been denied a penalty of its own in the first half when Anthony Martial tangled with Juventus defender Giorgio Chiellini.

Juventus, which leads Serie A and is in the Italian Cup final, remains on course for a treble under new coach Massimiliano Allegri.

"I haven't seen (the penalty) again so I can't judge," Allegri said. "It seemed to be a foul as a last man, however from the bench I didn't see if it was outside or inside.

"People who want to enjoy themselves can go to the circus. We have one objective and that is getting through. I'm happy with the result and the performance in parts, especially how we managed to defend at the end without conceding."