Why is it scored that way?
While the exact reason for this odd scoring system isn't set in stone, there are a few popular theories:
The French Theory: Some believe it stems from early French tennis, where points were tracked like a clock face in 15-minute increments (15, 30, 45). Over time, 45 was simplified to 40 before reaching the end of the game.French origin: Many believe the system comes from french Tennis. The points may have been based on a clock face: scores were counted in 15-minute intervals – 15, 30, 45 – with 45 later shortened to 40, followed by “game.”
The Betting Theory: Another suggestion is that the system evolved from early gambling habits, where bets were typically placed in 15-unit increments.Betting systems: Another theory is that the scoring developed from early betting practices, where wagers were placed in steps of 15.
Regardless of its origin, this system has remained intact over the years, becoming one of the most iconic and distinguishing elements of the sport.