Cello Sonata in G minor, op. 19

Sergei Rachmaninoff's Sonata in G minor for Cello and Piano, Op. 19, was completed on 20 November 1901; it was premiered by cellist Anatoliy Brandukov, the dedicatee of the work and Rachmaninoff's friend, with the composer at the piano, on 2 December 1901 in Moscow. The final version was completed 10 days after the premiere, 12 December 1901.

Rachmaninoff regarded the role of the piano as not just an accompaniment but equal to the cello. Most of the themes are introduced by the piano, while they are embellished and expanded in the cello's part.