The story
Because it is a wall and is located at the back of the court.
Etymology from Wiktionary, CC BY-SA 4.0.
back wall
Today it means: The wall at the back of a racquetball or squash court, directly opposite the front wall. Full definition →
Today it means: The wall at the back of a racquetball or squash court, directly opposite the front wall. Full definition →
Because it is a wall and is located at the back of the court.
Etymology from Wiktionary, CC BY-SA 4.0.