Max Reger composed his Three Suites for Cello solo in 1914-15 for three important cellists and teachers of the time, Julius Klengel, Hugo Becker and Paul Grümmer. Klengel was also friends with the composer. Reger humorously told him of his, Op. 131c in summer 1915, calling them''strapping triplets''. He asked the cellist to ''use these three things as often as possible in your lessons'', although they presuppose a great degree of skill on the students' part.