Siryl
The short story “Arena” by Fredric Brown appeared in Astounding Science Fiction Magazine in 1944, and was loosely adapted into the Star Trek episode of the same name which first aired in 1967.  This illustration by David Schleinkofer accompanied a 1980 reprinting of the story (by which time Astounding had changed its name to Analog).

The short story “Arena” by Fredric Brown appeared in Astounding Science Fiction Magazine in 1944, and was loosely adapted into the Star Trek episode of the same name which first aired in 1967.  This illustration by David Schleinkofer accompanied a 1980 reprinting of the story (by which time Astounding had changed its name to Analog).