Defeated finalists Brive had a second shot at promotion when they faced 2018–19 Top 14 13th placed side, Grenoble, in the relegation playoff. Brive won 28-22 to take Grenoble's place and join Bayonne in the 2019–20 Top 14. Grenoble and bottom club, Perpignan, would be relegated to the 2019–20 Rugby Pro D2.