Paul Le Guen's Paris Saint Germain safely booked their place in the French Cup quarter-finals with a 1-0 win over Valenciennes on Tuesday.

Valenciennes proved the bogey side for Le Guen's predessor Guy Lacombe, who was dismissed after PSG lost to them earlier this month.

Le Guen's outfit ensured no such repeat when Cristian Rodriguez produced the only goal of the game in the 55th minute.

But the capital side's cause was helped considerably by Valenciennes' Uruguayan keeper Nicolas Penneteau who let the ball slip safely from his clutches at Rodriguez' feet.

"We needed a good result to help our confidence," said Le Guen, brought in to save PSG's season after leaving Scottish giants Rangers in ignominious fashion after less than a season in charge.

Third division Vannes made it into the Cup last eight for the first time in their modest history after a 2-0 extra time win over second division Montpellier.

The Brittany minnows stunned the favourites for this on paper at least mismatched last 16 tie with Jerome Le Bouc's 100th minute strike.

The former Rennes and Nantes player was then instrumental in Vannes' second two minutes later when he set up Cedric Rjillo to keep their cup adventure well and truly alive.

"It's great that our adventure is continuing," said the club captain Christophe Le Roux.

"I take my hat off to the team."

Earlier Sochaux knocked out former Champions League finalists Monaco 2-0, the goals coming either side of the break from Romain Pitau and former Liverpool striker Anthony Le Tallec.

Monaco were whistled off by their home supporters at the Stade Louis-II after this tepid display.

"We deserved what we got," said Monaco's Sylvain Monsoreau.

"We didn't play, Sochaux taught us a lesson.'

Monaco's night was made worse after their Ivory coast international Yaya Toure had to come off with a torn ankle muscle.

First division Sedan overcame the banana skin presented by their second division opponents Libourne-Saint-Seurin, but only after a fightback.

Libourne took the lead one minute from the interval with Yahia Kebe's close range goal but they will have been kicking themselves for not converting at least half a dozen live chances.

Sedan levelled shortly after retaking the pitch thanks to former Cameroon international striker Joseph-Desire Job who pounced on some sloppy defending and he then produced the winner 20 minutes from time.

Wednesday's last 16 fixtures include out of form French champions Lyon up against Marseille and fourth division amateurs Monceau Les Mines against top flight rivals Bordeaux