Nice and Rennes both have ways to make the first breakthrough, yet their recent scorelines flatter how often they have made a second clean finish. Elversberg and Mainz should produce a more open exchange of wide attacks and counters. Each game turns on whether the side under pressure can end the next possession after a goal.
Rennes can press Nice goalkeeper Diouf and the first pass through Mandza, then use Frankowski or Nagida to feed Dia. Nice can escape toward Clauss and Nkounkou, with Wahi attacking the first delivery and Diop offering a later regain. Those are real routes on both sides, but Nice's latest Brest win came from two shots on target and its previous home wins each included an own goal.
Lepaul had already missed Rennes' Strasbourg win, so Dia and Szymański are the relevant current finishers. Samba played that match but is now listed out; Nice also lose Seidu after he played against Brest, while Clauss returned from an ankle issue with his full workload unsettled. I expect pressure and replies, with the next clean finish harder to repeat than the raw goals suggest. That's why I'm siding with a lower-scoring Nice–Rennes game.
Elversberg can attack Mainz's wing-backs with Petkov, Campbell and Krattenmacher, or find a second action from a corner. The cup loss to Darmstadt still produced six saved shots on target, showing that the home attack reached genuine finishing positions. Mainz can answer through Caci and Mwene's crosses toward Tietz and Lee, but Fischer has described the compactness and cover behind his own attacks as unfinished work after one training session.
Günther and Pinckert are listed as doubtful for Elversberg, though both completed the cup match. Mainz's Amiri missed the last two matches, and Zentner's return has yet to establish a full starting role. Elversberg should be able to push Mainz's outside defenders backward and keep finding a response even after an away spell of pressure. That's why I'm siding with Elversberg to avoid defeat.