Juventus' coach Massimiliano Allegri reacts during the UEFA Champions League quarter final football match Juventus FC vs AS Monaco on April 14, 2015 at the Juventus Stadium in Turin. [Photo/CFP]

Juve began to up the intensity again after a spell of Monaco pressure and Tevez wasted a golden opportunity when Claudio Marchisio found him unmarked with a delightful cross but the Argentine's weak effort went straight to Subasic.

Vidal also wasted good chances, including right on the stroke of halftime when he beat the offside trap to go through one-on-one but blasted over from close range.

Juventus finally broke the deadlock after Morata beat the offside trap but was brought down by Carvalho. The foul appeared to be outside the area and Monaco again protested in vain.

Vidal, who had missed two penalties this season, calmly fired it into the top left corner.

Monaco's Dimitar Berbatov came off the bench and almost had an instant impact but headed narrowly over with his first touch.