Match ends, Guingamp 1, Monaco 2.
Ligue 1 leaders Monaco moved three points clear with victory at Guingamp.
Monaco defender Kamil Glik stabbed in the opener from Thomas Lemar's first-half free-kick, helped on by Guingamp winger Jimmy Briand's poor clearance.
Falcao saw a bicycle kick diverted just over the bar, before 18-year-old striker Kylian Mbappe was fouled in the box by keeper Karl-Johan Johnsson.
Fabinho's chipped penalty put Monaco 2-0 up, before Etienne Didot fired home a late consolation from outside the box.
Second-placed Nice had moved level on points with Leonardo Jardim's side with a 2-1 home victory over Montpellier on Friday.
Defending champions Paris St-Germain, in third, are now six points behind Monaco but can narrow the gap when they play at Marseille on Sunday (20:00 GMT).
Monaco were beaten 5-3 by Manchester City in their Champions League last-16 first leg on Tuesday. They host City for the second leg on Wednesday, 15 March.
Elsewhere, Bordeaux moved up to fifth with a 3-2 win away to a Lille side that had two players sent off in the final 10 minutes.
Bottom side Lorient lost 1-0 at Rennes, who move up to eighth, Angers beat Bastia 3-0, and Nancy and Toulouse played out a goalless draw.
- 1JohnssonBooked at 86mins
- 2IkokoBooked at 62mins
- 8DeauxSubstituted forMendyat 45'minutes
- 17DidotBooked at 90mins
- 24CocoSubstituted forBenezetat 83'minutes
- 19SaliburSubstituted forde Pauwat 83'minutes
- 12de Pauw
- 19SidibeBooked at 64mins
- 10Bernardo Silva
- 8João Moutinho
- 2FabinhoBooked at 33mins
- 27LemarSubstituted forMbappeat 74'minutes
- 18GermainSubstituted forBakayokoat 74'minutes
- 9FalcaoSubstituted forCarrilloat 83'minutes
- 6de Oliveira Moraes
- 16De Sanctis
- Amaury Delerue
- Shots on Target
Second Half ends, Guingamp 1, Monaco 2.
Attempt blocked. Kylian Mbappe (Monaco) left footed shot from the right side of the box is blocked. Assisted by Bernardo Silva.
Offside, Monaco. Jemerson tries a through ball, but Guido Carrillo is caught offside.
Étienne Didot (Guingamp) is shown the yellow card for a bad foul.
Foul by Étienne Didot (Guingamp).
Fabinho (Monaco) wins a free kick in the defensive half.
Jordan Ikoko (Guingamp) wins a free kick in the defensive half.
Foul by Kylian Mbappe (Monaco).
Offside, Guingamp. Jordan Ikoko tries a through ball, but Moustapha Diallo is caught offside.
Goal! Guingamp 1, Monaco 2. Étienne Didot (Guingamp) left footed shot from outside the box to the top right corner.
Corner, Guingamp. Conceded by Jemerson.
Goal! Guingamp 0, Monaco 2. Fabinho (Monaco) converts the penalty with a right footed shot to the centre of the goal.
Karl-Johan Johnsson (Guingamp) is shown the yellow card for a bad foul.
Penalty conceded by Karl-Johan Johnsson (Guingamp) after a foul in the penalty area.
Penalty Monaco. Kylian Mbappe draws a foul in the penalty area.
Attempt missed. Kylian Mbappe (Monaco) left footed shot from the left side of the box is high and wide to the left. Assisted by Fabinho.
Substitution, Guingamp. Nicolas Benezet replaces Marcus Coco.
Substitution, Guingamp. Nill de Pauw replaces Yannis Salibur.
Substitution, Monaco. Guido Carrillo replaces Falcao.