Spirou the Sportsman (Spirou Sportif in the original French) is a comic one-pager possibly written by Rob-Vel, and drawn by either him or Luc Lafnet. It features Spirou and Entresol, as well as Spirou's Twin.
Behind the scenes
This one-pager was released in August of 1938 in Le Journal de Spirou #17 in Belgium. It was reprinted in the Spirou par Rob-Vel collection of all of Rob-Vel's Spirou comics. It has not known an official English printing to this day.