Grenoble secure shock victory
The win ignites vague hopes of escaping relegation for the Alpine hosts and leaves Toulouse rooted in seventh and outside the end-of-season play-off places.
Toulouse had been expecting a physical battle after back-to-back thumping victories (36-6 and 54-15) over hapless Italians Zebre in the European Champions Cup and so it proved to be.
It was just the third win of the season for the hosts who were inspired throughout and took the first try of the game on 20 minutes through hooker Loick Jammes.
Before Xavier Mignot scored the second on 51 Toulouse had a try of their own from Gael Fickou harshly ruled out for obstruction.
Jean-Marc Doussain scored all Toulouse's points but the side who finished sixth last term eventually struggled against the side who started bottom.
Grenoble fans celebrated wildly at the finish and the mood was reflected by their sports director Bernard Jackman.
"The holidays are going to be even better than expected for me and the players too," he said.
"We're not the best team but we can beat anyone on our day," he said.
After the game Doussain said: "We got one point but we came here to win so we feel a sense of frustration.
"So we'll have to go and find those points elsewhere now."
The big game of the week sees second-placed Montpellier host mega-rich Toulon on Friday in an encounter rendered all the more important by each side's European struggles.
Agence France-Presse