Primvs derby
| Other names | Unicul derby |
|---|---|
| Location | Muntenia, Romania |
| Teams | Rapid București Petrolul Ploiești |
| First meeting | 1 November 1931 Romanian Football Championship Juventus 3–3 CFR București |
| Latest meeting | 29 July 2024 Liga I Petrolul 1-0 Rapid |
| Next meeting | 30 November 2024 Liga I Rapid vs Petrolul |
| Stadiums | Ilie Oană Stadium (Petrolul) Valentin Stănescu Stadium (Rapid) |
| Statistics | |
| Meetings total | Official matches: 131 |
| Most wins | Official matches: Rapid București (63) |
| Largest victory | 22 September 1963 Divizia A Rapid 0-6 Petrolul |
The Primvs derby, also known as Unicul derby (English: The One derby), is a football derby match between Romanian clubs Rapid București and Petrolul Ploiești. It is called Primvs derby because one of the earliest rivalries in Romanian football was between Petrolul's predecessor Juventus București and CFR București (the original name of Rapid București), a rivalry which dates back to the interwar period.
This intense inter-city rivalry occurs at least twice a year through league fixtures and it has extended to the Romanian Cup as well. The history of both clubs is intertwined as they have alternated between competing for top honors during their peak periods and facing challenges like bankruptcy or relegation to the Second Division during their lows. Both have also fought one another to earn promotion back to the First Division in efforts to reclaim their status as leading clubs.