Ernesto Nazareth's '9 de julho' is a vibrant Brazilian tango, blending European dance forms with Afro-Brazilian rhythms. It is characterized by its sophisticated harmonies, memorable melodies, and infectious rhythmic vitality.
Mastery of syncopated rhythms and the characteristic 'tango' feel is essential.
9 de julho is rated Henle level 5 of 9 — late intermediate repertoire, roughly ABRSM grades 6–7. In the RCM system it corresponds to about level 7.
You should be comfortable at Henle level 5 — meaning you can already play level 4–5 pieces cleanly. Learning it one level early is possible as a stretch piece, but more than that usually leads to months of frustration.
9 de julho is available as free public-domain sheet music on IMSLP — the score is linked directly from this page.