Perpignan, leader of the regular season, won this Sunday, in its Aimé-Giral stadium and in front of 1,000 spectators, against Oyonnax (27-15) in the semi-final of the Pro D2.
The Catalans have scored four tries, against none for the "Oyomen".
In the final of accession to the Top 14, Usap - which left the elite in 2019 after a difficult season - will face the winner of the other half between Vannes and Biarritz, which takes place this Sunday at 6 p.m.
The winner of the final will be promoted to Top 14, the loser of the final will play a jump-off against the 13th of the Top 14, the Section Paloise or the Aviron Bayonnais.
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Pro D2 schedule and results