'''Cello Sonata in G minor''', Op. 19, a sonata for cello and piano, was completed in November 1901 and published a year later.
Rachmaninoff disliked calling it a cello sonata because he thought the two instruments were equal. Because of this, it is often referred to as '''Sonata in G minor for Cello and Piano'''. Most of the themes are introduced by the piano, while they are embellished and expanded in the cello's part.