Guingamp upset Le Mans to reach Cup quarters
Kone got the game-clinching goal in the 83rd minute.
A Xavier Pentecote double earned Toulouse a 2-0 win at Ligue 2 side Boulogne-sur-Mer. Pentecote, who has featured in only three Ligue 1 games this season, opened the scoring four minutes before the break when he latched onto an Alexandre Bonnet cross.
The 22-year-old striker grabbed his second on 62 minutes by beating Boulogne keeper Florian Bague from close range.
Grenoble went through after winning a penalty shootout 4-2 at Ligue 2 side Dijon following a 1-1 draw.
Defender Stephane Morisot's 15th-minute opener for the home side was cancelled out three minutes later by Grenoble striker Nassim Akrour.
The draw for the March 17-18 quarter-final ties will be made on Sunday.