While this cup is not as prestigious as the Coupe de France or even a Champions League qualifying spot, for the clubs meeting at the Stade de France it is a big deal as shown by Romeyer's vow to pedal there if his players reached the final.
St Etienne won the last of 16 major domestic titles when they clinched the league in 1981, while Rennes have not won anything since the 1971 Coupe de France.
The Brittany side have done little to boost their confidence before the final as they come into it on an eight-game winless streak, having failed to score in their last four matches.
"Two months without a win is a long, very long, time," coach Frederic Antonetti said.
"We are in a difficult situation. Our opponents are the favourites. Given the situation, we are not the underdogs, we are the dead losers of that final.
"I'm not the only one who says that, just read the papers. But we'll give everything in this game."
Rennes, who will be without injured defender Herita Ilunga, can draw some hope from the fact that St Etienne, who had been in ominous form, suffered their first defeat of 2013 when they were knocked out of the Coupe de France quarter-finals on Tuesday.
"This is an untimely defeat," striker Pierre-Emerick Aubameyang said after the 2-1 stoppage-time defeat by Lorient ended a 17-game unbeaten run in all competitions.
"But I do not think it is going to affect us for Saturday's final."
Midfielder Renaud Cohade agreed, adding: "I do not think it will destabilise the squad ahead of the final."
- Sports & Recreation
- Coupe de France
- Stade de France
- St Etienne