History of Tennis Rules (1877–2026): From First Wimbledon to 10-Pt Tiebreak
How lawn tennis evolved from Major Walter Wingfield's hourglass-shaped courts to today's electronic line-calling.
Verified against: ITF History & Grand Slam Board ArchivesTennis Rule Evolution Timeline
First Wimbledon Championship Codification
The All England Croquet and Lawn Tennis Club set standard rectangular court dimensions and introduced the 15-30-40 scoring system still used today.
International Lawn Tennis Federation Founded
Twelve national tennis associations met in Paris and founded the International Lawn Tennis Federation (ILTF) — the sport's first global rule-making body.
The Open Era Begins
Wimbledon and the other Grand Slams voted to let professional players compete alongside amateurs, ending decades of separation between the two.
Tiebreak System Debuts at US Open
Jimmy Van Alen's tiebreak system debuted at the US Open, giving players a way to end a set without playing an endless string of deuce games.
Hawk-Eye Electronic Line Calling Approved
The US Open became the first Grand Slam to let players challenge line calls using Hawk-Eye electronic review.
Unified 10-Point Final Set Tiebreak Enacted
All four Grand Slams agreed on one shared rule: a 10-point tiebreak decides the final set once it reaches 6-6.