The Gran Premio Selección de Potrancas (previously known as the Premio Selección) is a Group 1 thoroughbred horse race in Argentina for three-year-old fillies. The race is run over on the dirt at the Hipódromo de La Plata. History. When the graded stakes system was introduced in Argentina in 1973, the Premio Selección was initially rated a Group 2 race. By 1979, the race had been upgraded to a Group 1 race. The race was downgraded back to Group 2 in 1984, then upgraded again to Group 1 in 1987, a designation it has retained since. In 1987, the race was renamed to the Gran Premio Selección de Potrancas, having previously been known as the Premio Selección and being distinguished from the Gran Premio Selección run at the Hipódromo Argentino de Palermo by specifying the track. Records since 1988. Speed record: Greatest margin of victory: Most wins by a jockey: Most wins by a trainer: Most wins by an owner: Most wins by a breeder: