Guingamp destroyed derby rivals Rennes at Roazhon Park which consequently almost guarantees their league safety.
It was a hat-trick of assists by Guingamp midfield maestro Thibault Giresse as he was the provider for Moustapha Diallo, Jimmy Briand and Younousse Sankhare.
First half with not a lot of chances
Guingamp were looking to take advantage of Toulouse dropping points as both teams are vying for their safety in Ligue 1. The away side started strong and on the front foot but could not find the ideal opener.
It was to be Brittany icon Yoann Gourcuff who would have the first clear cut chance on goal when he managed to get a shot away following a cross at Jonas Lossl but the Danish international keeper was equal to it.
Just after the half hour mark Briand ended his determined run into the box but hitting a shot straight at Benoit Costil under the pressure of the defender.
Dominant Guingamp prevail in the second period
Five minutes after the restart and Rennes passed up two fantastic chances to take the lead. Benjamin Andre's header was tipped over the bar by Lossl and then from the corner Mexer had his effort cleared off the line.
Guingamp youngster Ludovic Blas tested Costil for the first time in the match when his long range effort heading for the top corner made the French international earn his pay to palm it away.
A few moments later and Guingamp did take the lead. In a bizarre sequence of play Diallo managed to notch the ball home before Costil kicked it away. Goal line technology was needed to certify the goal even against the protestations of the Rennes players.
Only 10 minutes had passed and Guingamp doubled their lead and tightened their hold on the match. Rennes substitute Mehdi Zeffane sold himself on the wing allowing Giresse to tee up Briand who subsequently backheeled the ball into the net.
Guingamp finished the match scoring for the day by hitting their third goal on 77 minutes. Giresse's cross from the left picked out Sankhare who was free in the centre of the box and powerfully headed home.
The win for the visitors puts them in a much more comfortable position at the bottom half of the table, now eight points ahead of Gazelec Ajaccio. However, for Rennes, they have put themselves in a very difficult position in their chase for European football next season. They have dropped to seventh and are now in amongst the pack all aiming for the Europa League spots. They host Monaco next week in a match some will have already written off as a victory for the team from the principality.