14 June 1931 - The La Plata Derby Turns Pro

On 14 June 1931, Estudiantes and Gimnasia played the first La Plata derby of the professional era, which ended as a 1-1 draw.

Gimnasia are the older club, dating back to 1887, while Estudiantes came along much later in 1905, but the two teams did not play each other until 1916, when Gimnasia won 1-0 thanks to an Estudiantes own goal. The balance of power soon shifted to the younger team, however, and they amassed a record of five wins for Estudiantes, three for Gimnasia, and five draws as amateurs (two of Gimnasia's wins were due to forfeits).

After Argentinian football turned professional in 1931, Gimnasia hosted the first derby, a league match in the top flight which ended as yet another draw. That remains the most common result in the derby, with a record of 49 Gimnasia wins, 56 Estudiantes wins, and 57 draws in a total of 162 matches.