Postpublished at 87 mins
Monaco 0-2 Juventus
... Joao Moutinho floats the ball in, fantastic free-kick, but it is just out of the reach of a diving Radamel Falcao.
Higuain scores both from Alves assists
Second leg in Turin on 9 May
Monaco into Champions League semis for fourth time
Juventus reached the final in five of their six previous semis
Get involved #bbcfootball
Gary Rose
Monaco 0-2 Juventus
... Joao Moutinho floats the ball in, fantastic free-kick, but it is just out of the reach of a diving Radamel Falcao.
Monaco 0-2 Juventus
Monaco have a free-kick a couple of yards outside the area. Might be their last chance to set up a tense final few minutes...
Monaco 0-2 Juventus
Juventus have kept quiet the usually deadly triumvirate of Lionel Messi, Neymar and Luis Suarez and are on the verge of stubbing out the most potent attack in Europe.
Could this be the year they go all the way?
Monaco are continuing to plug away, but the Juventus defence looks untroubled.
Monaco 0-2 Juventus
Juventus make another change as Claudio Marchisio is replaced by the defence-minded Tomas Rincon for the final few minutes.
Monaco's final change sees Almamy Toure on for Bernardo Silva.
Monaco 0-2 Juventus
Oooh, Giorgio Chiellini, you've got away with this one.
Nabil Dirar's cross should be easy pickings for the defender but it bounces off his heel and agonisingly just in front of and beyond Radamel Falcao.
#bbcfootball
Thomashollern: Where's this boy Mbappe we have been hearing so much about? Needs to step up now and throw his team a lifeline
Charles Endabertie: Juventus are holding a masterclass in old school football & it's working, as it should do!
Monaco 0-2 Juventus
Miralem Pjanic misjudges a cross and allows a cross to go through him to Radamel Falcao. For a second, it looks like a real chance for the striker, but he control the ball with his arm and the referee blows for a foul.
Monaco 0-2 Juventus
There'll be no hat-trick for Gonzalo Higuain. He's replaced by on-loan Chelsea winger Juan Cuadrado for the final quarter of an hour.
Monaco 0-2 Juventus
Radamel Falcao is crowded out as he gets the ball at his feet from Fabinho right in front of goal.
Monaco are still plugging away, but time is increasingly against them.
Monaco 0-2 Juventus
Strange atmosphere inside the Stade Louis II, very quiet. It doesn't feel like a Champions League semi-final at all.
The Juventus fans are having a ball, though.
Chris Sutton
Ex-Chelsea striker at Wembley for 5 live Sport
Gigi Buffon deserves the title of the third best player in the world (after Messi and Ronaldo).
What a career he has had. What a professional he is and he is still playing to the highest possible standard at his age.
Monaco 0-2 Juventus
Should Juventus be down to 10 men?
Giorgio Chiellini's elbow ends up in Radamel Falcao's face. Referee Antonio Mateu Lahoz is straight over to brandish the yellow card at the Juventus defender.
Chiellini can perhaps count himself lucky to still be on the pitch.
Monaco 0-2 Juventus
Double change for Monaco - they have to do something. On come Valere Germain and Joao Moutinho and off go Thomas Lemar and Tiemoue Bakayoko.
Monaco 0-1 Juventus
Kylian Mbappe drives a free-kick into the Juventus wall and immediately the Italians break. There's panic on the faces of the Monaco fans as a sweeping, cross-field pass finds Dani Alves on the edge but he tumbles after a challenge and the hosts clear.
Saurabh Pillai: Just when you need someone to score. What a match Higuain is having!
Monaco 0-2 Juventus
Monaco can only have themselves to blame for the situation they find themselves in. They have had their chances but failed to put them away.
They need to keep their heads. A goal would at least keep them in the tie.
Monaco 0-2 Juventus
If we look at the average positions players have taken up in the first hour of this fixture we see Monaco have pushed up more. Kylian Mbappe (29) has led the way but despite Juve sitting that bit deeper, they have hurt the hosts clinically.
Monaco 0-2 Juventus
Dani Alves and Gonzalo Higuain combine again to put Juventus well in control.
This time, Alves lofts a cross in from the right, it seems to take an age and you can see what is coming from a mile away but the precision is perfect and there's nothing Monaco can do as Higuain stabs in from close range.
Gonzalo Higuain
Game over?