Zlatan Ibrahimovic's second-half strike saw Paris St Germain restore some authority over St Etienne as they advanced to the semi-finals of the Coupe de la Ligue with a 1-0 away win.
St Etienne, who had been unbeaten in domestic action since October 5, moved above PSG into third place in Ligue 1 with their win over Reims on Saturday, but were made to bow to the champions on their home turf on Tuesday night.
It was a tight match of few chances, but Ibrahimovic settled it in the 72nd minute, meeting Lucas' cross at the far post with his chest to beat Stephane Ruffier.
St Etienne argued the ball had not crossed the line but the goal stood and their fans reacted by hurling objects at Ibrahimovic. Check out his goal below:
Tuesday's other quarter-final saw Bastia - who stunned PSG 4-2 in the league at the weekend - advance with a 3-1 win over Rennes, but they had to come from behind to do it, helped by two second-half red cards for the visitors.
Rennes took a 12th minute lead through Sylvain Armand, but the game turned in the second half.
Sebastien Squillaci levelled seconds after the restart, and Rennes then imploded after the hour mark.
First, Anders Konradsen collected a second yellow card in the 65th minute. Six minutes later, Romain Denze turned the ball into his own net. And soon after that, Ermir Lenjani was shown a straight red for a poor challenge on Guillaime Gillet, leaving Rennes with nine men and little hope.
However, it took until the 89th minute for Bastia to strike the final blow as substitute Djibril Cisse wrapped up the win.